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Finding the Fourth Proportional to 215.44, 297.25 and 145.38

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Solution

The fourth proportional to 215.44, 297.25 and 145.38 is: 200.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.44 : 297.25 = 145.38 : x
  2. Step 2: Convert to fraction form
    215.44/297.25 = 145.38/x
  3. Step 3: Cross multiply
    215.44x = 297.25 × 145.38
  4. Step 4: Simplify right side
    215.44x = 43,214.21
  5. Step 5: Solve for x
    x = 43,214.21/215.44
  6. Step 6: Final answer
    x = 200.59

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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.