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Finding the Fourth Proportional to 721,287.70, 995,290.30 and 415,463.55

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Solution

The fourth proportional to 721,287.70, 995,290.30 and 415,463.55 is: 573,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,287.70 : 995,290.30 = 415,463.55 : x
  2. Step 2: Convert to fraction form
    721,287.70/995,290.30 = 415,463.55/x
  3. Step 3: Cross multiply
    721,287.70x = 995,290.30 × 415,463.55
  4. Step 4: Simplify right side
    721,287.70x = 413,506,841,318.57
  5. Step 5: Solve for x
    x = 413,506,841,318.57/721,287.70
  6. Step 6: Final answer
    x = 573,289.74

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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.