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Finding the Fourth Proportional to 217.84, 325.46 and 215.92

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Solution

The fourth proportional to 217.84, 325.46 and 215.92 is: 322.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.84 : 325.46 = 215.92 : x
  2. Step 2: Convert to fraction form
    217.84/325.46 = 215.92/x
  3. Step 3: Cross multiply
    217.84x = 325.46 × 215.92
  4. Step 4: Simplify right side
    217.84x = 70,273.32
  5. Step 5: Solve for x
    x = 70,273.32/217.84
  6. Step 6: Final answer
    x = 322.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.