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Finding the Fourth Proportional to 215.72, 297.15 and 204.74

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Solution

The fourth proportional to 215.72, 297.15 and 204.74 is: 282.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.72 : 297.15 = 204.74 : x
  2. Step 2: Convert to fraction form
    215.72/297.15 = 204.74/x
  3. Step 3: Cross multiply
    215.72x = 297.15 × 204.74
  4. Step 4: Simplify right side
    215.72x = 60,837.01
  5. Step 5: Solve for x
    x = 60,837.01/215.72
  6. Step 6: Final answer
    x = 282.02

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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.