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Finding the Fourth Proportional to 148.94, 221.58 and 140.30

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Solution

The fourth proportional to 148.94, 221.58 and 140.30 is: 208.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.94 : 221.58 = 140.30 : x
  2. Step 2: Convert to fraction form
    148.94/221.58 = 140.30/x
  3. Step 3: Cross multiply
    148.94x = 221.58 × 140.30
  4. Step 4: Simplify right side
    148.94x = 31,086.57
  5. Step 5: Solve for x
    x = 31,086.57/148.94
  6. Step 6: Final answer
    x = 208.73

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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.