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Finding the Fourth Proportional to 513,000.85, 769,501.28 and 453,951.85

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Solution

The fourth proportional to 513,000.85, 769,501.28 and 453,951.85 is: 680,927.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,000.85 : 769,501.28 = 453,951.85 : x
  2. Step 2: Convert to fraction form
    513,000.85/769,501.28 = 453,951.85/x
  3. Step 3: Cross multiply
    513,000.85x = 769,501.28 × 453,951.85
  4. Step 4: Simplify right side
    513,000.85x = 349,316,527,363.61
  5. Step 5: Solve for x
    x = 349,316,527,363.61/513,000.85
  6. Step 6: Final answer
    x = 680,927.78

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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.