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Finding the Fourth Proportional to 148.98, 221.99 and 144.79

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Solution

The fourth proportional to 148.98, 221.99 and 144.79 is: 215.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.98 : 221.99 = 144.79 : x
  2. Step 2: Convert to fraction form
    148.98/221.99 = 144.79/x
  3. Step 3: Cross multiply
    148.98x = 221.99 × 144.79
  4. Step 4: Simplify right side
    148.98x = 32,141.93
  5. Step 5: Solve for x
    x = 32,141.93/148.98
  6. Step 6: Final answer
    x = 215.75

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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.