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Finding the Fourth Proportional to 637.04, 878.31 and 487.84

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Solution

The fourth proportional to 637.04, 878.31 and 487.84 is: 672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.04 : 878.31 = 487.84 : x
  2. Step 2: Convert to fraction form
    637.04/878.31 = 487.84/x
  3. Step 3: Cross multiply
    637.04x = 878.31 × 487.84
  4. Step 4: Simplify right side
    637.04x = 428,474.75
  5. Step 5: Solve for x
    x = 428,474.75/637.04
  6. Step 6: Final answer
    x = 672.60

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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.