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Finding the Fourth Proportional to 932.90, 1,399.25 and 239.54

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Solution

The fourth proportional to 932.90, 1,399.25 and 239.54 is: 359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.90 : 1,399.25 = 239.54 : x
  2. Step 2: Convert to fraction form
    932.90/1,399.25 = 239.54/x
  3. Step 3: Cross multiply
    932.90x = 1,399.25 × 239.54
  4. Step 4: Simplify right side
    932.90x = 335,176.47
  5. Step 5: Solve for x
    x = 335,176.47/932.90
  6. Step 6: Final answer
    x = 359.29

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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.