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Finding the Fourth Proportional to 637.46, 879.39 and 401.30

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Solution

The fourth proportional to 637.46, 879.39 and 401.30 is: 553.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.46 : 879.39 = 401.30 : x
  2. Step 2: Convert to fraction form
    637.46/879.39 = 401.30/x
  3. Step 3: Cross multiply
    637.46x = 879.39 × 401.30
  4. Step 4: Simplify right side
    637.46x = 352,898.01
  5. Step 5: Solve for x
    x = 352,898.01/637.46
  6. Step 6: Final answer
    x = 553.60

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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.