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Finding the Fourth Proportional to 651.06, 976.29 and 217.92

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Solution

The fourth proportional to 651.06, 976.29 and 217.92 is: 326.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.06 : 976.29 = 217.92 : x
  2. Step 2: Convert to fraction form
    651.06/976.29 = 217.92/x
  3. Step 3: Cross multiply
    651.06x = 976.29 × 217.92
  4. Step 4: Simplify right side
    651.06x = 212,753.12
  5. Step 5: Solve for x
    x = 212,753.12/651.06
  6. Step 6: Final answer
    x = 326.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.