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Finding the Fourth Proportional to 718,540.73, 991,572.41 and 396,280.61

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Solution

The fourth proportional to 718,540.73, 991,572.41 and 396,280.61 is: 546,859.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,540.73 : 991,572.41 = 396,280.61 : x
  2. Step 2: Convert to fraction form
    718,540.73/991,572.41 = 396,280.61/x
  3. Step 3: Cross multiply
    718,540.73x = 991,572.41 × 396,280.61
  4. Step 4: Simplify right side
    718,540.73x = 392,940,917,512.57
  5. Step 5: Solve for x
    x = 392,940,917,512.57/718,540.73
  6. Step 6: Final answer
    x = 546,859.63

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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.