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Finding the Fourth Proportional to 148.09, 220.98 and 147.24

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Solution

The fourth proportional to 148.09, 220.98 and 147.24 is: 219.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.09 : 220.98 = 147.24 : x
  2. Step 2: Convert to fraction form
    148.09/220.98 = 147.24/x
  3. Step 3: Cross multiply
    148.09x = 220.98 × 147.24
  4. Step 4: Simplify right side
    148.09x = 32,538.02
  5. Step 5: Solve for x
    x = 32,538.02/148.09
  6. Step 6: Final answer
    x = 219.71

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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.