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Finding the Fourth Proportional to 657,187.10, 985,780.65 and 432,800.90

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Solution

The fourth proportional to 657,187.10, 985,780.65 and 432,800.90 is: 649,201.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,187.10 : 985,780.65 = 432,800.90 : x
  2. Step 2: Convert to fraction form
    657,187.10/985,780.65 = 432,800.90/x
  3. Step 3: Cross multiply
    657,187.10x = 985,780.65 × 432,800.90
  4. Step 4: Simplify right side
    657,187.10x = 426,646,752,522.59
  5. Step 5: Solve for x
    x = 426,646,752,522.59/657,187.10
  6. Step 6: Final answer
    x = 649,201.35

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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.