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Finding the Fourth Proportional to 494,349.75, 681,542.91 and 392,712.57

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Solution

The fourth proportional to 494,349.75, 681,542.91 and 392,712.57 is: 541,419.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,349.75 : 681,542.91 = 392,712.57 : x
  2. Step 2: Convert to fraction form
    494,349.75/681,542.91 = 392,712.57/x
  3. Step 3: Cross multiply
    494,349.75x = 681,542.91 × 392,712.57
  4. Step 4: Simplify right side
    494,349.75x = 267,650,467,751.38
  5. Step 5: Solve for x
    x = 267,650,467,751.38/494,349.75
  6. Step 6: Final answer
    x = 541,419.24

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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.