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Finding the Fourth Proportional to 721,761.50, 995,943.50 and 415,938.11

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Solution

The fourth proportional to 721,761.50, 995,943.50 and 415,938.11 is: 573,944.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,761.50 : 995,943.50 = 415,938.11 : x
  2. Step 2: Convert to fraction form
    721,761.50/995,943.50 = 415,938.11/x
  3. Step 3: Cross multiply
    721,761.50x = 995,943.50 × 415,938.11
  4. Step 4: Simplify right side
    721,761.50x = 414,250,851,557.15
  5. Step 5: Solve for x
    x = 414,250,851,557.15/721,761.50
  6. Step 6: Final answer
    x = 573,944.23

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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.