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Finding the Fourth Proportional to 240.28, 358.73 and 217.60

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Solution

The fourth proportional to 240.28, 358.73 and 217.60 is: 324.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.28 : 358.73 = 217.60 : x
  2. Step 2: Convert to fraction form
    240.28/358.73 = 217.60/x
  3. Step 3: Cross multiply
    240.28x = 358.73 × 217.60
  4. Step 4: Simplify right side
    240.28x = 78,059.65
  5. Step 5: Solve for x
    x = 78,059.65/240.28
  6. Step 6: Final answer
    x = 324.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.