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Finding the Fourth Proportional to 306.20, 458.96 and 169.22

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Solution

The fourth proportional to 306.20, 458.96 and 169.22 is: 253.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.20 : 458.96 = 169.22 : x
  2. Step 2: Convert to fraction form
    306.20/458.96 = 169.22/x
  3. Step 3: Cross multiply
    306.20x = 458.96 × 169.22
  4. Step 4: Simplify right side
    306.20x = 77,665.21
  5. Step 5: Solve for x
    x = 77,665.21/306.20
  6. Step 6: Final answer
    x = 253.64

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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.