Home / 1,288,143,145.80-1,932,214,718.70-879,996,457.80

Finding the Fourth Proportional to 1,288,143,145.80, 1,932,214,718.70 and 879,996,457.80

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Solution

The fourth proportional to 1,288,143,145.80, 1,932,214,718.70 and 879,996,457.80 is: 1,319,994,686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,143,145.80 : 1,932,214,718.70 = 879,996,457.80 : x
  2. Step 2: Convert to fraction form
    1,288,143,145.80/1,932,214,718.70 = 879,996,457.80/x
  3. Step 3: Cross multiply
    1,288,143,145.80x = 1,932,214,718.70 × 879,996,457.80
  4. Step 4: Simplify right side
    1,288,143,145.80x = 1,700,342,108,165,023,488
  5. Step 5: Solve for x
    x = 1,700,342,108,165,023,488/1,288,143,145.80
  6. Step 6: Final answer
    x = 1,319,994,686.70

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.