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Finding the Fourth Proportional to 637.92, 879.95 and 401.49

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Solution

The fourth proportional to 637.92, 879.95 and 401.49 is: 553.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.92 : 879.95 = 401.49 : x
  2. Step 2: Convert to fraction form
    637.92/879.95 = 401.49/x
  3. Step 3: Cross multiply
    637.92x = 879.95 × 401.49
  4. Step 4: Simplify right side
    637.92x = 353,291.13
  5. Step 5: Solve for x
    x = 353,291.13/637.92
  6. Step 6: Final answer
    x = 553.82

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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.