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Finding the Fourth Proportional to 487.98, 731.94 and 163.38

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Solution

The fourth proportional to 487.98, 731.94 and 163.38 is: 245.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.98 : 731.94 = 163.38 : x
  2. Step 2: Convert to fraction form
    487.98/731.94 = 163.38/x
  3. Step 3: Cross multiply
    487.98x = 731.94 × 163.38
  4. Step 4: Simplify right side
    487.98x = 119,584.36
  5. Step 5: Solve for x
    x = 119,584.36/487.98
  6. Step 6: Final answer
    x = 245.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.