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Finding the Fourth Proportional to 218.34, 329.99 and 214.56

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Solution

The fourth proportional to 218.34, 329.99 and 214.56 is: 324.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.34 : 329.99 = 214.56 : x
  2. Step 2: Convert to fraction form
    218.34/329.99 = 214.56/x
  3. Step 3: Cross multiply
    218.34x = 329.99 × 214.56
  4. Step 4: Simplify right side
    218.34x = 70,802.65
  5. Step 5: Solve for x
    x = 70,802.65/218.34
  6. Step 6: Final answer
    x = 324.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.