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Finding the Fourth Proportional to 621,806.40, 932,709.60 and 472,507.20

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Solution

The fourth proportional to 621,806.40, 932,709.60 and 472,507.20 is: 708,760.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,806.40 : 932,709.60 = 472,507.20 : x
  2. Step 2: Convert to fraction form
    621,806.40/932,709.60 = 472,507.20/x
  3. Step 3: Cross multiply
    621,806.40x = 932,709.60 × 472,507.20
  4. Step 4: Simplify right side
    621,806.40x = 440,712,001,509.12
  5. Step 5: Solve for x
    x = 440,712,001,509.12/621,806.40
  6. Step 6: Final answer
    x = 708,760.80

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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.