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Finding the Fourth Proportional to 649.82, 974.79 and 217.01

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Solution

The fourth proportional to 649.82, 974.79 and 217.01 is: 325.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.82 : 974.79 = 217.01 : x
  2. Step 2: Convert to fraction form
    649.82/974.79 = 217.01/x
  3. Step 3: Cross multiply
    649.82x = 974.79 × 217.01
  4. Step 4: Simplify right side
    649.82x = 211,539.18
  5. Step 5: Solve for x
    x = 211,539.18/649.82
  6. Step 6: Final answer
    x = 325.54

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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.