Home / 1,391,878.32-2,088,024.84-643,999.92

Finding the Fourth Proportional to 1,391,878.32, 2,088,024.84 and 643,999.92

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Solution

The fourth proportional to 1,391,878.32, 2,088,024.84 and 643,999.92 is: 966,095.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,878.32 : 2,088,024.84 = 643,999.92 : x
  2. Step 2: Convert to fraction form
    1,391,878.32/2,088,024.84 = 643,999.92/x
  3. Step 3: Cross multiply
    1,391,878.32x = 2,088,024.84 × 643,999.92
  4. Step 4: Simplify right side
    1,391,878.32x = 1,344,687,829,918.01
  5. Step 5: Solve for x
    x = 1,344,687,829,918.01/1,391,878.32
  6. Step 6: Final answer
    x = 966,095.82

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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.