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Finding the Fourth Proportional to 454.32, 626.96 and 257.79

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Solution

The fourth proportional to 454.32, 626.96 and 257.79 is: 355.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.32 : 626.96 = 257.79 : x
  2. Step 2: Convert to fraction form
    454.32/626.96 = 257.79/x
  3. Step 3: Cross multiply
    454.32x = 626.96 × 257.79
  4. Step 4: Simplify right side
    454.32x = 161,622.73
  5. Step 5: Solve for x
    x = 161,622.73/454.32
  6. Step 6: Final answer
    x = 355.75

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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.