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Finding the Fourth Proportional to 721,513.71, 995,530.90 and 431,081.70

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Solution

The fourth proportional to 721,513.71, 995,530.90 and 431,081.70 is: 594,798.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,513.71 : 995,530.90 = 431,081.70 : x
  2. Step 2: Convert to fraction form
    721,513.71/995,530.90 = 431,081.70/x
  3. Step 3: Cross multiply
    721,513.71x = 995,530.90 × 431,081.70
  4. Step 4: Simplify right side
    721,513.71x = 429,155,152,774.53
  5. Step 5: Solve for x
    x = 429,155,152,774.53/721,513.71
  6. Step 6: Final answer
    x = 594,798.33

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.