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Finding the Fourth Proportional to 200.50, 276.72 and 113.20

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Solution

The fourth proportional to 200.50, 276.72 and 113.20 is: 156.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.50 : 276.72 = 113.20 : x
  2. Step 2: Convert to fraction form
    200.50/276.72 = 113.20/x
  3. Step 3: Cross multiply
    200.50x = 276.72 × 113.20
  4. Step 4: Simplify right side
    200.50x = 31,324.70
  5. Step 5: Solve for x
    x = 31,324.70/200.50
  6. Step 6: Final answer
    x = 156.23

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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.