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Finding the Fourth Proportional to 215.28, 297.27 and 145.38

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Solution

The fourth proportional to 215.28, 297.27 and 145.38 is: 200.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.28 : 297.27 = 145.38 : x
  2. Step 2: Convert to fraction form
    215.28/297.27 = 145.38/x
  3. Step 3: Cross multiply
    215.28x = 297.27 × 145.38
  4. Step 4: Simplify right side
    215.28x = 43,217.11
  5. Step 5: Solve for x
    x = 43,217.11/215.28
  6. Step 6: Final answer
    x = 200.75

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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.