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Finding the Fourth Proportional to 276.93, 415.22 and 91.77

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Solution

The fourth proportional to 276.93, 415.22 and 91.77 is: 137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.93 : 415.22 = 91.77 : x
  2. Step 2: Convert to fraction form
    276.93/415.22 = 91.77/x
  3. Step 3: Cross multiply
    276.93x = 415.22 × 91.77
  4. Step 4: Simplify right side
    276.93x = 38,104.74
  5. Step 5: Solve for x
    x = 38,104.74/276.93
  6. Step 6: Final answer
    x = 137.60

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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.