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Finding the Fourth Proportional to 351.68, 527.04 and 279.20

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Solution

The fourth proportional to 351.68, 527.04 and 279.20 is: 418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.68 : 527.04 = 279.20 : x
  2. Step 2: Convert to fraction form
    351.68/527.04 = 279.20/x
  3. Step 3: Cross multiply
    351.68x = 527.04 × 279.20
  4. Step 4: Simplify right side
    351.68x = 147,149.57
  5. Step 5: Solve for x
    x = 147,149.57/351.68
  6. Step 6: Final answer
    x = 418.42

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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.