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Finding the Fourth Proportional to 355.08, 531.52 and 239.52

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Solution

The fourth proportional to 355.08, 531.52 and 239.52 is: 358.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.08 : 531.52 = 239.52 : x
  2. Step 2: Convert to fraction form
    355.08/531.52 = 239.52/x
  3. Step 3: Cross multiply
    355.08x = 531.52 × 239.52
  4. Step 4: Simplify right side
    355.08x = 127,309.67
  5. Step 5: Solve for x
    x = 127,309.67/355.08
  6. Step 6: Final answer
    x = 358.54

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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.