Home / 864,138.80-1,296,208.20-490,890.80

Finding the Fourth Proportional to 864,138.80, 1,296,208.20 and 490,890.80

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Solution

The fourth proportional to 864,138.80, 1,296,208.20 and 490,890.80 is: 736,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,138.80 : 1,296,208.20 = 490,890.80 : x
  2. Step 2: Convert to fraction form
    864,138.80/1,296,208.20 = 490,890.80/x
  3. Step 3: Cross multiply
    864,138.80x = 1,296,208.20 × 490,890.80
  4. Step 4: Simplify right side
    864,138.80x = 636,296,680,264.56
  5. Step 5: Solve for x
    x = 636,296,680,264.56/864,138.80
  6. Step 6: Final answer
    x = 736,336.20

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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.