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Finding the Fourth Proportional to 148.48, 220.96 and 143.02

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Solution

The fourth proportional to 148.48, 220.96 and 143.02 is: 212.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.48 : 220.96 = 143.02 : x
  2. Step 2: Convert to fraction form
    148.48/220.96 = 143.02/x
  3. Step 3: Cross multiply
    148.48x = 220.96 × 143.02
  4. Step 4: Simplify right side
    148.48x = 31,600.91
  5. Step 5: Solve for x
    x = 31,600.91/148.48
  6. Step 6: Final answer
    x = 212.82

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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.