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Finding the Fourth Proportional to 637.78, 880.13 and 372.40

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Solution

The fourth proportional to 637.78, 880.13 and 372.40 is: 513.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.78 : 880.13 = 372.40 : x
  2. Step 2: Convert to fraction form
    637.78/880.13 = 372.40/x
  3. Step 3: Cross multiply
    637.78x = 880.13 × 372.40
  4. Step 4: Simplify right side
    637.78x = 327,760.41
  5. Step 5: Solve for x
    x = 327,760.41/637.78
  6. Step 6: Final answer
    x = 513.91

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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.