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Finding the Fourth Proportional to 239.40, 358.55 and 170.55

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Solution

The fourth proportional to 239.40, 358.55 and 170.55 is: 255.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.40 : 358.55 = 170.55 : x
  2. Step 2: Convert to fraction form
    239.40/358.55 = 170.55/x
  3. Step 3: Cross multiply
    239.40x = 358.55 × 170.55
  4. Step 4: Simplify right side
    239.40x = 61,150.70
  5. Step 5: Solve for x
    x = 61,150.70/239.40
  6. Step 6: Final answer
    x = 255.43

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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.