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Finding the Fourth Proportional to 520,234.88, 780,198.40 and 220,711.68

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Solution

The fourth proportional to 520,234.88, 780,198.40 and 220,711.68 is: 331,002.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,234.88 : 780,198.40 = 220,711.68 : x
  2. Step 2: Convert to fraction form
    520,234.88/780,198.40 = 220,711.68/x
  3. Step 3: Cross multiply
    520,234.88x = 780,198.40 × 220,711.68
  4. Step 4: Simplify right side
    520,234.88x = 172,198,899,597.31
  5. Step 5: Solve for x
    x = 172,198,899,597.31/520,234.88
  6. Step 6: Final answer
    x = 331,002.22

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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.