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Finding the Fourth Proportional to 217.40, 325.48 and 121.04

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Solution

The fourth proportional to 217.40, 325.48 and 121.04 is: 181.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.40 : 325.48 = 121.04 : x
  2. Step 2: Convert to fraction form
    217.40/325.48 = 121.04/x
  3. Step 3: Cross multiply
    217.40x = 325.48 × 121.04
  4. Step 4: Simplify right side
    217.40x = 39,396.10
  5. Step 5: Solve for x
    x = 39,396.10/217.40
  6. Step 6: Final answer
    x = 181.21

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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.