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Finding the Fourth Proportional to 148.48, 221.33 and 147.34

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Solution

The fourth proportional to 148.48, 221.33 and 147.34 is: 219.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.48 : 221.33 = 147.34 : x
  2. Step 2: Convert to fraction form
    148.48/221.33 = 147.34/x
  3. Step 3: Cross multiply
    148.48x = 221.33 × 147.34
  4. Step 4: Simplify right side
    148.48x = 32,610.76
  5. Step 5: Solve for x
    x = 32,610.76/148.48
  6. Step 6: Final answer
    x = 219.63

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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.