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Finding the Fourth Proportional to 216.59, 324.71 and 88.43

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Solution

The fourth proportional to 216.59, 324.71 and 88.43 is: 132.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.59 : 324.71 = 88.43 : x
  2. Step 2: Convert to fraction form
    216.59/324.71 = 88.43/x
  3. Step 3: Cross multiply
    216.59x = 324.71 × 88.43
  4. Step 4: Simplify right side
    216.59x = 28,713.66
  5. Step 5: Solve for x
    x = 28,713.66/216.59
  6. Step 6: Final answer
    x = 132.57

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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.