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Finding the Fourth Proportional to 637.63, 879.97 and 401.49

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Solution

The fourth proportional to 637.63, 879.97 and 401.49 is: 554.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.63 : 879.97 = 401.49 : x
  2. Step 2: Convert to fraction form
    637.63/879.97 = 401.49/x
  3. Step 3: Cross multiply
    637.63x = 879.97 × 401.49
  4. Step 4: Simplify right side
    637.63x = 353,302.96
  5. Step 5: Solve for x
    x = 353,302.96/637.63
  6. Step 6: Final answer
    x = 554.09

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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.