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Finding the Fourth Proportional to 240.32, 331.64 and 135.40

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Solution

The fourth proportional to 240.32, 331.64 and 135.40 is: 186.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.32 : 331.64 = 135.40 : x
  2. Step 2: Convert to fraction form
    240.32/331.64 = 135.40/x
  3. Step 3: Cross multiply
    240.32x = 331.64 × 135.40
  4. Step 4: Simplify right side
    240.32x = 44,904.70
  5. Step 5: Solve for x
    x = 44,904.70/240.32
  6. Step 6: Final answer
    x = 186.86

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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.