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Finding the Fourth Proportional to 218.71, 301.80 and 144.88

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Solution

The fourth proportional to 218.71, 301.80 and 144.88 is: 199.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.71 : 301.80 = 144.88 : x
  2. Step 2: Convert to fraction form
    218.71/301.80 = 144.88/x
  3. Step 3: Cross multiply
    218.71x = 301.80 × 144.88
  4. Step 4: Simplify right side
    218.71x = 43,724.78
  5. Step 5: Solve for x
    x = 43,724.78/218.71
  6. Step 6: Final answer
    x = 199.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.