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Finding the Fourth Proportional to 520,061.70, 780,118.15 and 271,229.70

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Solution

The fourth proportional to 520,061.70, 780,118.15 and 271,229.70 is: 406,857.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,061.70 : 780,118.15 = 271,229.70 : x
  2. Step 2: Convert to fraction form
    520,061.70/780,118.15 = 271,229.70/x
  3. Step 3: Cross multiply
    520,061.70x = 780,118.15 × 271,229.70
  4. Step 4: Simplify right side
    520,061.70x = 211,591,211,789.06
  5. Step 5: Solve for x
    x = 211,591,211,789.06/520,061.70
  6. Step 6: Final answer
    x = 406,857.90

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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.