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Finding the Fourth Proportional to 650.94, 976.30 and 212.20

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Solution

The fourth proportional to 650.94, 976.30 and 212.20 is: 318.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.94 : 976.30 = 212.20 : x
  2. Step 2: Convert to fraction form
    650.94/976.30 = 212.20/x
  3. Step 3: Cross multiply
    650.94x = 976.30 × 212.20
  4. Step 4: Simplify right side
    650.94x = 207,170.86
  5. Step 5: Solve for x
    x = 207,170.86/650.94
  6. Step 6: Final answer
    x = 318.26

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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.