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Finding the Fourth Proportional to 276.03, 380.91 and 151.68

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Solution

The fourth proportional to 276.03, 380.91 and 151.68 is: 209.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.03 : 380.91 = 151.68 : x
  2. Step 2: Convert to fraction form
    276.03/380.91 = 151.68/x
  3. Step 3: Cross multiply
    276.03x = 380.91 × 151.68
  4. Step 4: Simplify right side
    276.03x = 57,776.43
  5. Step 5: Solve for x
    x = 57,776.43/276.03
  6. Step 6: Final answer
    x = 209.31

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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.