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Finding the Fourth Proportional to 487.35, 731.09 and 179.18

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Solution

The fourth proportional to 487.35, 731.09 and 179.18 is: 268.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.35 : 731.09 = 179.18 : x
  2. Step 2: Convert to fraction form
    487.35/731.09 = 179.18/x
  3. Step 3: Cross multiply
    487.35x = 731.09 × 179.18
  4. Step 4: Simplify right side
    487.35x = 130,993.41
  5. Step 5: Solve for x
    x = 130,993.41/487.35
  6. Step 6: Final answer
    x = 268.79

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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.