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Finding the Fourth Proportional to 637.13, 879.60 and 481.61

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Solution

The fourth proportional to 637.13, 879.60 and 481.61 is: 664.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.13 : 879.60 = 481.61 : x
  2. Step 2: Convert to fraction form
    637.13/879.60 = 481.61/x
  3. Step 3: Cross multiply
    637.13x = 879.60 × 481.61
  4. Step 4: Simplify right side
    637.13x = 423,619.76
  5. Step 5: Solve for x
    x = 423,619.76/637.13
  6. Step 6: Final answer
    x = 664.89

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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.