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Finding the Fourth Proportional to 454.38, 627 and 257.90

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Solution

The fourth proportional to 454.38, 627 and 257.90 is: 355.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.38 : 627 = 257.90 : x
  2. Step 2: Convert to fraction form
    454.38/627 = 257.90/x
  3. Step 3: Cross multiply
    454.38x = 627 × 257.90
  4. Step 4: Simplify right side
    454.38x = 161,700.17
  5. Step 5: Solve for x
    x = 161,700.17/454.38
  6. Step 6: Final answer
    x = 355.87

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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.