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Finding the Fourth Proportional to 621,490.80, 932,236.20 and 521,763.60

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Solution

The fourth proportional to 621,490.80, 932,236.20 and 521,763.60 is: 782,645.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,490.80 : 932,236.20 = 521,763.60 : x
  2. Step 2: Convert to fraction form
    621,490.80/932,236.20 = 521,763.60/x
  3. Step 3: Cross multiply
    621,490.80x = 932,236.20 × 521,763.60
  4. Step 4: Simplify right side
    621,490.80x = 486,406,915,762.32
  5. Step 5: Solve for x
    x = 486,406,915,762.32/621,490.80
  6. Step 6: Final answer
    x = 782,645.40

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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.