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Finding the Fourth Proportional to 240.24, 331.60 and 136.76

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Solution

The fourth proportional to 240.24, 331.60 and 136.76 is: 188.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.24 : 331.60 = 136.76 : x
  2. Step 2: Convert to fraction form
    240.24/331.60 = 136.76/x
  3. Step 3: Cross multiply
    240.24x = 331.60 × 136.76
  4. Step 4: Simplify right side
    240.24x = 45,349.62
  5. Step 5: Solve for x
    x = 45,349.62/240.24
  6. Step 6: Final answer
    x = 188.77

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Find fourth proportional to 120.12, 165.80 and 68.38
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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.