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Finding the Fourth Proportional to 200.96, 276.20 and 188.72

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Solution

The fourth proportional to 200.96, 276.20 and 188.72 is: 259.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.96 : 276.20 = 188.72 : x
  2. Step 2: Convert to fraction form
    200.96/276.20 = 188.72/x
  3. Step 3: Cross multiply
    200.96x = 276.20 × 188.72
  4. Step 4: Simplify right side
    200.96x = 52,124.46
  5. Step 5: Solve for x
    x = 52,124.46/200.96
  6. Step 6: Final answer
    x = 259.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.