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Finding the Fourth Proportional to 650.61, 976.05 and 217.80

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Solution

The fourth proportional to 650.61, 976.05 and 217.80 is: 326.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.61 : 976.05 = 217.80 : x
  2. Step 2: Convert to fraction form
    650.61/976.05 = 217.80/x
  3. Step 3: Cross multiply
    650.61x = 976.05 × 217.80
  4. Step 4: Simplify right side
    650.61x = 212,583.69
  5. Step 5: Solve for x
    x = 212,583.69/650.61
  6. Step 6: Final answer
    x = 326.75

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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.