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Finding the Fourth Proportional to 149.04, 221.67 and 147.15

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Solution

The fourth proportional to 149.04, 221.67 and 147.15 is: 218.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.04 : 221.67 = 147.15 : x
  2. Step 2: Convert to fraction form
    149.04/221.67 = 147.15/x
  3. Step 3: Cross multiply
    149.04x = 221.67 × 147.15
  4. Step 4: Simplify right side
    149.04x = 32,618.74
  5. Step 5: Solve for x
    x = 32,618.74/149.04
  6. Step 6: Final answer
    x = 218.86

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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.