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Finding the Fourth Proportional to 200.86, 276.96 and 178.72

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Solution

The fourth proportional to 200.86, 276.96 and 178.72 is: 246.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.86 : 276.96 = 178.72 : x
  2. Step 2: Convert to fraction form
    200.86/276.96 = 178.72/x
  3. Step 3: Cross multiply
    200.86x = 276.96 × 178.72
  4. Step 4: Simplify right side
    200.86x = 49,498.29
  5. Step 5: Solve for x
    x = 49,498.29/200.86
  6. Step 6: Final answer
    x = 246.43

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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.