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Finding the Fourth Proportional to 218.31, 301.20 and 169.10

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Solution

The fourth proportional to 218.31, 301.20 and 169.10 is: 233.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.31 : 301.20 = 169.10 : x
  2. Step 2: Convert to fraction form
    218.31/301.20 = 169.10/x
  3. Step 3: Cross multiply
    218.31x = 301.20 × 169.10
  4. Step 4: Simplify right side
    218.31x = 50,931.91
  5. Step 5: Solve for x
    x = 50,931.91/218.31
  6. Step 6: Final answer
    x = 233.30

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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.