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Finding the Fourth Proportional to 515,115.76, 772,516.50 and 356,213.20

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Solution

The fourth proportional to 515,115.76, 772,516.50 and 356,213.20 is: 534,211.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,115.76 : 772,516.50 = 356,213.20 : x
  2. Step 2: Convert to fraction form
    515,115.76/772,516.50 = 356,213.20/x
  3. Step 3: Cross multiply
    515,115.76x = 772,516.50 × 356,213.20
  4. Step 4: Simplify right side
    515,115.76x = 275,180,574,517.80
  5. Step 5: Solve for x
    x = 275,180,574,517.80/515,115.76
  6. Step 6: Final answer
    x = 534,211.13

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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.