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Finding the Fourth Proportional to 649.70, 974.34 and 216.75

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Solution

The fourth proportional to 649.70, 974.34 and 216.75 is: 325.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.70 : 974.34 = 216.75 : x
  2. Step 2: Convert to fraction form
    649.70/974.34 = 216.75/x
  3. Step 3: Cross multiply
    649.70x = 974.34 × 216.75
  4. Step 4: Simplify right side
    649.70x = 211,188.20
  5. Step 5: Solve for x
    x = 211,188.20/649.70
  6. Step 6: Final answer
    x = 325.06

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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.