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Finding the Fourth Proportional to 411,426.10, 617,139.15 and 253,141.30

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Solution

The fourth proportional to 411,426.10, 617,139.15 and 253,141.30 is: 379,711.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,426.10 : 617,139.15 = 253,141.30 : x
  2. Step 2: Convert to fraction form
    411,426.10/617,139.15 = 253,141.30/x
  3. Step 3: Cross multiply
    411,426.10x = 617,139.15 × 253,141.30
  4. Step 4: Simplify right side
    411,426.10x = 156,223,406,711.90
  5. Step 5: Solve for x
    x = 156,223,406,711.90/411,426.10
  6. Step 6: Final answer
    x = 379,711.95

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Double scale
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Similar ratio
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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.