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Finding the Fourth Proportional to 621,819.60, 932,729.40 and 432,862.80

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Solution

The fourth proportional to 621,819.60, 932,729.40 and 432,862.80 is: 649,294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,819.60 : 932,729.40 = 432,862.80 : x
  2. Step 2: Convert to fraction form
    621,819.60/932,729.40 = 432,862.80/x
  3. Step 3: Cross multiply
    621,819.60x = 932,729.40 × 432,862.80
  4. Step 4: Simplify right side
    621,819.60x = 403,743,859,726.32
  5. Step 5: Solve for x
    x = 403,743,859,726.32/621,819.60
  6. Step 6: Final answer
    x = 649,294.20

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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.