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Finding the Fourth Proportional to 520,665.52, 780,105.84 and 349,566.70

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Solution

The fourth proportional to 520,665.52, 780,105.84 and 349,566.70 is: 523,750.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,665.52 : 780,105.84 = 349,566.70 : x
  2. Step 2: Convert to fraction form
    520,665.52/780,105.84 = 349,566.70/x
  3. Step 3: Cross multiply
    520,665.52x = 780,105.84 × 349,566.70
  4. Step 4: Simplify right side
    520,665.52x = 272,699,024,139.53
  5. Step 5: Solve for x
    x = 272,699,024,139.53/520,665.52
  6. Step 6: Final answer
    x = 523,750.88

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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.