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Finding the Fourth Proportional to 200.74, 276.92 and 130.78

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Solution

The fourth proportional to 200.74, 276.92 and 130.78 is: 180.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.74 : 276.92 = 130.78 : x
  2. Step 2: Convert to fraction form
    200.74/276.92 = 130.78/x
  3. Step 3: Cross multiply
    200.74x = 276.92 × 130.78
  4. Step 4: Simplify right side
    200.74x = 36,215.60
  5. Step 5: Solve for x
    x = 36,215.60/200.74
  6. Step 6: Final answer
    x = 180.41

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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.