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Finding the Fourth Proportional to 240.81, 332.28 and 135.89

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Solution

The fourth proportional to 240.81, 332.28 and 135.89 is: 187.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.81 : 332.28 = 135.89 : x
  2. Step 2: Convert to fraction form
    240.81/332.28 = 135.89/x
  3. Step 3: Cross multiply
    240.81x = 332.28 × 135.89
  4. Step 4: Simplify right side
    240.81x = 45,151.87
  5. Step 5: Solve for x
    x = 45,151.87/240.81
  6. Step 6: Final answer
    x = 187.50

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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.