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Finding the Fourth Proportional to 200, 276 and 112.69

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Solution

The fourth proportional to 200, 276 and 112.69 is: 155.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    200 : 276 = 112.69 : x
  2. Step 2: Convert to fraction form
    200/276 = 112.69/x
  3. Step 3: Cross multiply
    200x = 276 × 112.69
  4. Step 4: Simplify right side
    200x = 31,102.44
  5. Step 5: Solve for x
    x = 31,102.44/200
  6. Step 6: Final answer
    x = 155.51

Related Problems

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Double scale
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1.5x scale

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.