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Finding the Fourth Proportional to 534,640.80, 801,961.20 and 499,211.40

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Solution

The fourth proportional to 534,640.80, 801,961.20 and 499,211.40 is: 748,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,640.80 : 801,961.20 = 499,211.40 : x
  2. Step 2: Convert to fraction form
    534,640.80/801,961.20 = 499,211.40/x
  3. Step 3: Cross multiply
    534,640.80x = 801,961.20 × 499,211.40
  4. Step 4: Simplify right side
    534,640.80x = 400,348,173,397.68
  5. Step 5: Solve for x
    x = 400,348,173,397.68/534,640.80
  6. Step 6: Final answer
    x = 748,817.10

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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.