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Finding the Fourth Proportional to 455.38, 627.91 and 372.24

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Solution

The fourth proportional to 455.38, 627.91 and 372.24 is: 513.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.38 : 627.91 = 372.24 : x
  2. Step 2: Convert to fraction form
    455.38/627.91 = 372.24/x
  3. Step 3: Cross multiply
    455.38x = 627.91 × 372.24
  4. Step 4: Simplify right side
    455.38x = 233,732.29
  5. Step 5: Solve for x
    x = 233,732.29/455.38
  6. Step 6: Final answer
    x = 513.27

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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.