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Finding the Fourth Proportional to 521,389.56, 782,380.20 and 281,500.27

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Solution

The fourth proportional to 521,389.56, 782,380.20 and 281,500.27 is: 422,410.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,389.56 : 782,380.20 = 281,500.27 : x
  2. Step 2: Convert to fraction form
    521,389.56/782,380.20 = 281,500.27/x
  3. Step 3: Cross multiply
    521,389.56x = 782,380.20 × 281,500.27
  4. Step 4: Simplify right side
    521,389.56x = 220,240,235,586.70
  5. Step 5: Solve for x
    x = 220,240,235,586.70/521,389.56
  6. Step 6: Final answer
    x = 422,410.13

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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.