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Finding the Fourth Proportional to 200.38, 276.28 and 145.09

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Solution

The fourth proportional to 200.38, 276.28 and 145.09 is: 200.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.38 : 276.28 = 145.09 : x
  2. Step 2: Convert to fraction form
    200.38/276.28 = 145.09/x
  3. Step 3: Cross multiply
    200.38x = 276.28 × 145.09
  4. Step 4: Simplify right side
    200.38x = 40,085.47
  5. Step 5: Solve for x
    x = 40,085.47/200.38
  6. Step 6: Final answer
    x = 200.05

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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.