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Finding the Fourth Proportional to 621,715.20, 932,572.80 and 572,726.40

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Solution

The fourth proportional to 621,715.20, 932,572.80 and 572,726.40 is: 859,089.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,715.20 : 932,572.80 = 572,726.40 : x
  2. Step 2: Convert to fraction form
    621,715.20/932,572.80 = 572,726.40/x
  3. Step 3: Cross multiply
    621,715.20x = 932,572.80 × 572,726.40
  4. Step 4: Simplify right side
    621,715.20x = 534,109,062,481.92
  5. Step 5: Solve for x
    x = 534,109,062,481.92/621,715.20
  6. Step 6: Final answer
    x = 859,089.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.