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Finding the Fourth Proportional to 650.68, 975.98 and 217.78

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Solution

The fourth proportional to 650.68, 975.98 and 217.78 is: 326.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.68 : 975.98 = 217.78 : x
  2. Step 2: Convert to fraction form
    650.68/975.98 = 217.78/x
  3. Step 3: Cross multiply
    650.68x = 975.98 × 217.78
  4. Step 4: Simplify right side
    650.68x = 212,548.92
  5. Step 5: Solve for x
    x = 212,548.92/650.68
  6. Step 6: Final answer
    x = 326.66

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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.