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Finding the Fourth Proportional to 649,385.70, 974,078.55 and 436,809.30

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Solution

The fourth proportional to 649,385.70, 974,078.55 and 436,809.30 is: 655,213.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,385.70 : 974,078.55 = 436,809.30 : x
  2. Step 2: Convert to fraction form
    649,385.70/974,078.55 = 436,809.30/x
  3. Step 3: Cross multiply
    649,385.70x = 974,078.55 × 436,809.30
  4. Step 4: Simplify right side
    649,385.70x = 425,486,569,570.52
  5. Step 5: Solve for x
    x = 425,486,569,570.52/649,385.70
  6. Step 6: Final answer
    x = 655,213.95

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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.