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Finding the Fourth Proportional to 721,061.55, 995,024.41 and 394,309.71

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Solution

The fourth proportional to 721,061.55, 995,024.41 and 394,309.71 is: 544,125.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,061.55 : 995,024.41 = 394,309.71 : x
  2. Step 2: Convert to fraction form
    721,061.55/995,024.41 = 394,309.71/x
  3. Step 3: Cross multiply
    721,061.55x = 995,024.41 × 394,309.71
  4. Step 4: Simplify right side
    721,061.55x = 392,347,785,564.25
  5. Step 5: Solve for x
    x = 392,347,785,564.25/721,061.55
  6. Step 6: Final answer
    x = 544,125.24

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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.