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Finding the Fourth Proportional to 325.22, 487.02 and 217.13

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Solution

The fourth proportional to 325.22, 487.02 and 217.13 is: 325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.22 : 487.02 = 217.13 : x
  2. Step 2: Convert to fraction form
    325.22/487.02 = 217.13/x
  3. Step 3: Cross multiply
    325.22x = 487.02 × 217.13
  4. Step 4: Simplify right side
    325.22x = 105,746.65
  5. Step 5: Solve for x
    x = 105,746.65/325.22
  6. Step 6: Final answer
    x = 325.15

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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.