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Finding the Fourth Proportional to 239.31, 358.55 and 170.49

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Solution

The fourth proportional to 239.31, 358.55 and 170.49 is: 255.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.31 : 358.55 = 170.49 : x
  2. Step 2: Convert to fraction form
    239.31/358.55 = 170.49/x
  3. Step 3: Cross multiply
    239.31x = 358.55 × 170.49
  4. Step 4: Simplify right side
    239.31x = 61,129.19
  5. Step 5: Solve for x
    x = 61,129.19/239.31
  6. Step 6: Final answer
    x = 255.44

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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.