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Finding the Fourth Proportional to 179, 268.80 and 115.28

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Solution

The fourth proportional to 179, 268.80 and 115.28 is: 173.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    179 : 268.80 = 115.28 : x
  2. Step 2: Convert to fraction form
    179/268.80 = 115.28/x
  3. Step 3: Cross multiply
    179x = 268.80 × 115.28
  4. Step 4: Simplify right side
    179x = 30,987.26
  5. Step 5: Solve for x
    x = 30,987.26/179
  6. Step 6: Final answer
    x = 173.11

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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.