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Finding the Fourth Proportional to 637.54, 879.98 and 372.21

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Solution

The fourth proportional to 637.54, 879.98 and 372.21 is: 513.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.54 : 879.98 = 372.21 : x
  2. Step 2: Convert to fraction form
    637.54/879.98 = 372.21/x
  3. Step 3: Cross multiply
    637.54x = 879.98 × 372.21
  4. Step 4: Simplify right side
    637.54x = 327,537.36
  5. Step 5: Solve for x
    x = 327,537.36/637.54
  6. Step 6: Final answer
    x = 513.75

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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.