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Finding the Fourth Proportional to 301.80, 452.78 and 147.72

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Solution

The fourth proportional to 301.80, 452.78 and 147.72 is: 221.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.80 : 452.78 = 147.72 : x
  2. Step 2: Convert to fraction form
    301.80/452.78 = 147.72/x
  3. Step 3: Cross multiply
    301.80x = 452.78 × 147.72
  4. Step 4: Simplify right side
    301.80x = 66,884.66
  5. Step 5: Solve for x
    x = 66,884.66/301.80
  6. Step 6: Final answer
    x = 221.62

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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.