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Finding the Fourth Proportional to 217.17, 321.93 and 213.93

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Solution

The fourth proportional to 217.17, 321.93 and 213.93 is: 317.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.17 : 321.93 = 213.93 : x
  2. Step 2: Convert to fraction form
    217.17/321.93 = 213.93/x
  3. Step 3: Cross multiply
    217.17x = 321.93 × 213.93
  4. Step 4: Simplify right side
    217.17x = 68,870.48
  5. Step 5: Solve for x
    x = 68,870.48/217.17
  6. Step 6: Final answer
    x = 317.13

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.