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Finding the Fourth Proportional to 541,387.40, 812,081.10 and 442,972.40

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Solution

The fourth proportional to 541,387.40, 812,081.10 and 442,972.40 is: 664,458.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,387.40 : 812,081.10 = 442,972.40 : x
  2. Step 2: Convert to fraction form
    541,387.40/812,081.10 = 442,972.40/x
  3. Step 3: Cross multiply
    541,387.40x = 812,081.10 × 442,972.40
  4. Step 4: Simplify right side
    541,387.40x = 359,729,513,861.64
  5. Step 5: Solve for x
    x = 359,729,513,861.64/541,387.40
  6. Step 6: Final answer
    x = 664,458.60

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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.