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Finding the Fourth Proportional to 520,640.08, 780,679.48 and 280,882.52

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Solution

The fourth proportional to 520,640.08, 780,679.48 and 280,882.52 is: 421,172.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,640.08 : 780,679.48 = 280,882.52 : x
  2. Step 2: Convert to fraction form
    520,640.08/780,679.48 = 280,882.52/x
  3. Step 3: Cross multiply
    520,640.08x = 780,679.48 × 280,882.52
  4. Step 4: Simplify right side
    520,640.08x = 219,279,219,654.69
  5. Step 5: Solve for x
    x = 219,279,219,654.69/520,640.08
  6. Step 6: Final answer
    x = 421,172.38

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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.