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Finding the Fourth Proportional to 148.68, 224.28 and 144.72

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Solution

The fourth proportional to 148.68, 224.28 and 144.72 is: 218.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.68 : 224.28 = 144.72 : x
  2. Step 2: Convert to fraction form
    148.68/224.28 = 144.72/x
  3. Step 3: Cross multiply
    148.68x = 224.28 × 144.72
  4. Step 4: Simplify right side
    148.68x = 32,457.80
  5. Step 5: Solve for x
    x = 32,457.80/148.68
  6. Step 6: Final answer
    x = 218.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.