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Finding the Fourth Proportional to 240.31, 331.60 and 135.39

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Solution

The fourth proportional to 240.31, 331.60 and 135.39 is: 186.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.31 : 331.60 = 135.39 : x
  2. Step 2: Convert to fraction form
    240.31/331.60 = 135.39/x
  3. Step 3: Cross multiply
    240.31x = 331.60 × 135.39
  4. Step 4: Simplify right side
    240.31x = 44,895.32
  5. Step 5: Solve for x
    x = 44,895.32/240.31
  6. Step 6: Final answer
    x = 186.82

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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.