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Finding the Fourth Proportional to 216.31, 324.47 and 88.06

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Solution

The fourth proportional to 216.31, 324.47 and 88.06 is: 132.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.31 : 324.47 = 88.06 : x
  2. Step 2: Convert to fraction form
    216.31/324.47 = 88.06/x
  3. Step 3: Cross multiply
    216.31x = 324.47 × 88.06
  4. Step 4: Simplify right side
    216.31x = 28,572.83
  5. Step 5: Solve for x
    x = 28,572.83/216.31
  6. Step 6: Final answer
    x = 132.09

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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.