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Finding the Fourth Proportional to 216.89, 323.97 and 155.53

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Solution

The fourth proportional to 216.89, 323.97 and 155.53 is: 232.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.89 : 323.97 = 155.53 : x
  2. Step 2: Convert to fraction form
    216.89/323.97 = 155.53/x
  3. Step 3: Cross multiply
    216.89x = 323.97 × 155.53
  4. Step 4: Simplify right side
    216.89x = 50,386.24
  5. Step 5: Solve for x
    x = 50,386.24/216.89
  6. Step 6: Final answer
    x = 232.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.