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Finding the Fourth Proportional to 240.76, 332.08 and 221.15

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Solution

The fourth proportional to 240.76, 332.08 and 221.15 is: 305.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.76 : 332.08 = 221.15 : x
  2. Step 2: Convert to fraction form
    240.76/332.08 = 221.15/x
  3. Step 3: Cross multiply
    240.76x = 332.08 × 221.15
  4. Step 4: Simplify right side
    240.76x = 73,439.15
  5. Step 5: Solve for x
    x = 73,439.15/240.76
  6. Step 6: Final answer
    x = 305.04

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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.