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Finding the Fourth Proportional to 637.76, 879.26 and 488.48

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Solution

The fourth proportional to 637.76, 879.26 and 488.48 is: 673.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.76 : 879.26 = 488.48 : x
  2. Step 2: Convert to fraction form
    637.76/879.26 = 488.48/x
  3. Step 3: Cross multiply
    637.76x = 879.26 × 488.48
  4. Step 4: Simplify right side
    637.76x = 429,494.09
  5. Step 5: Solve for x
    x = 429,494.09/637.76
  6. Step 6: Final answer
    x = 673.45

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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.