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Finding the Fourth Proportional to 148.44, 220.78 and 145.37

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Solution

The fourth proportional to 148.44, 220.78 and 145.37 is: 216.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.44 : 220.78 = 145.37 : x
  2. Step 2: Convert to fraction form
    148.44/220.78 = 145.37/x
  3. Step 3: Cross multiply
    148.44x = 220.78 × 145.37
  4. Step 4: Simplify right side
    148.44x = 32,092.96
  5. Step 5: Solve for x
    x = 32,092.96/148.44
  6. Step 6: Final answer
    x = 216.20

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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.