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Finding the Fourth Proportional to 240.08, 329.20 and 228.72

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Solution

The fourth proportional to 240.08, 329.20 and 228.72 is: 313.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.08 : 329.20 = 228.72 : x
  2. Step 2: Convert to fraction form
    240.08/329.20 = 228.72/x
  3. Step 3: Cross multiply
    240.08x = 329.20 × 228.72
  4. Step 4: Simplify right side
    240.08x = 75,294.62
  5. Step 5: Solve for x
    x = 75,294.62/240.08
  6. Step 6: Final answer
    x = 313.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.