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Finding the Fourth Proportional to 306.11, 458.36 and 257.24

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Solution

The fourth proportional to 306.11, 458.36 and 257.24 is: 385.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.11 : 458.36 = 257.24 : x
  2. Step 2: Convert to fraction form
    306.11/458.36 = 257.24/x
  3. Step 3: Cross multiply
    306.11x = 458.36 × 257.24
  4. Step 4: Simplify right side
    306.11x = 117,909.35
  5. Step 5: Solve for x
    x = 117,909.35/306.11
  6. Step 6: Final answer
    x = 385.18

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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.