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Finding the Fourth Proportional to 276.39, 380.76 and 193.35

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Solution

The fourth proportional to 276.39, 380.76 and 193.35 is: 266.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.39 : 380.76 = 193.35 : x
  2. Step 2: Convert to fraction form
    276.39/380.76 = 193.35/x
  3. Step 3: Cross multiply
    276.39x = 380.76 × 193.35
  4. Step 4: Simplify right side
    276.39x = 73,619.95
  5. Step 5: Solve for x
    x = 73,619.95/276.39
  6. Step 6: Final answer
    x = 266.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.