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Finding the Fourth Proportional to 239.10, 329.88 and 135.60

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Solution

The fourth proportional to 239.10, 329.88 and 135.60 is: 187.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.10 : 329.88 = 135.60 : x
  2. Step 2: Convert to fraction form
    239.10/329.88 = 135.60/x
  3. Step 3: Cross multiply
    239.10x = 329.88 × 135.60
  4. Step 4: Simplify right side
    239.10x = 44,731.73
  5. Step 5: Solve for x
    x = 44,731.73/239.10
  6. Step 6: Final answer
    x = 187.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.