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Finding the Fourth Proportional to 216.67, 324.73 and 143.53

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Solution

The fourth proportional to 216.67, 324.73 and 143.53 is: 215.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.67 : 324.73 = 143.53 : x
  2. Step 2: Convert to fraction form
    216.67/324.73 = 143.53/x
  3. Step 3: Cross multiply
    216.67x = 324.73 × 143.53
  4. Step 4: Simplify right side
    216.67x = 46,608.50
  5. Step 5: Solve for x
    x = 46,608.50/216.67
  6. Step 6: Final answer
    x = 215.11

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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.