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Finding the Fourth Proportional to 276.72, 415.12 and 114.32

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Solution

The fourth proportional to 276.72, 415.12 and 114.32 is: 171.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.72 : 415.12 = 114.32 : x
  2. Step 2: Convert to fraction form
    276.72/415.12 = 114.32/x
  3. Step 3: Cross multiply
    276.72x = 415.12 × 114.32
  4. Step 4: Simplify right side
    276.72x = 47,456.52
  5. Step 5: Solve for x
    x = 47,456.52/276.72
  6. Step 6: Final answer
    x = 171.50

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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.