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Finding the Fourth Proportional to 301.67, 451.79 and 147.70

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Solution

The fourth proportional to 301.67, 451.79 and 147.70 is: 221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.67 : 451.79 = 147.70 : x
  2. Step 2: Convert to fraction form
    301.67/451.79 = 147.70/x
  3. Step 3: Cross multiply
    301.67x = 451.79 × 147.70
  4. Step 4: Simplify right side
    301.67x = 66,729.38
  5. Step 5: Solve for x
    x = 66,729.38/301.67
  6. Step 6: Final answer
    x = 221.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.