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Finding the Fourth Proportional to 718,503.92, 991,512.60 and 396,227.60

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Solution

The fourth proportional to 718,503.92, 991,512.60 and 396,227.60 is: 546,781.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,503.92 : 991,512.60 = 396,227.60 : x
  2. Step 2: Convert to fraction form
    718,503.92/991,512.60 = 396,227.60/x
  3. Step 3: Cross multiply
    718,503.92x = 991,512.60 × 396,227.60
  4. Step 4: Simplify right side
    718,503.92x = 392,864,657,867.76
  5. Step 5: Solve for x
    x = 392,864,657,867.76/718,503.92
  6. Step 6: Final answer
    x = 546,781.51

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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.