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Finding the Fourth Proportional to 276.69, 415.34 and 173.71

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Solution

The fourth proportional to 276.69, 415.34 and 173.71 is: 260.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.69 : 415.34 = 173.71 : x
  2. Step 2: Convert to fraction form
    276.69/415.34 = 173.71/x
  3. Step 3: Cross multiply
    276.69x = 415.34 × 173.71
  4. Step 4: Simplify right side
    276.69x = 72,148.71
  5. Step 5: Solve for x
    x = 72,148.71/276.69
  6. Step 6: Final answer
    x = 260.76

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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.