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Finding the Fourth Proportional to 200.75, 277.05 and 113.42

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Solution

The fourth proportional to 200.75, 277.05 and 113.42 is: 156.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.75 : 277.05 = 113.42 : x
  2. Step 2: Convert to fraction form
    200.75/277.05 = 113.42/x
  3. Step 3: Cross multiply
    200.75x = 277.05 × 113.42
  4. Step 4: Simplify right side
    200.75x = 31,423.01
  5. Step 5: Solve for x
    x = 31,423.01/200.75
  6. Step 6: Final answer
    x = 156.53

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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.