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Finding the Fourth Proportional to 276.86, 382.19 and 188.51

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Solution

The fourth proportional to 276.86, 382.19 and 188.51 is: 260.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.86 : 382.19 = 188.51 : x
  2. Step 2: Convert to fraction form
    276.86/382.19 = 188.51/x
  3. Step 3: Cross multiply
    276.86x = 382.19 × 188.51
  4. Step 4: Simplify right side
    276.86x = 72,043.78
  5. Step 5: Solve for x
    x = 72,043.78/276.86
  6. Step 6: Final answer
    x = 260.22

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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.