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Finding the Fourth Proportional to 175.38, 262.80 and 103.20

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Solution

The fourth proportional to 175.38, 262.80 and 103.20 is: 154.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.38 : 262.80 = 103.20 : x
  2. Step 2: Convert to fraction form
    175.38/262.80 = 103.20/x
  3. Step 3: Cross multiply
    175.38x = 262.80 × 103.20
  4. Step 4: Simplify right side
    175.38x = 27,120.96
  5. Step 5: Solve for x
    x = 27,120.96/175.38
  6. Step 6: Final answer
    x = 154.64

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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.