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Finding the Fourth Proportional to 216.72, 299.07 and 118.48

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Solution

The fourth proportional to 216.72, 299.07 and 118.48 is: 163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.72 : 299.07 = 118.48 : x
  2. Step 2: Convert to fraction form
    216.72/299.07 = 118.48/x
  3. Step 3: Cross multiply
    216.72x = 299.07 × 118.48
  4. Step 4: Simplify right side
    216.72x = 35,433.02
  5. Step 5: Solve for x
    x = 35,433.02/216.72
  6. Step 6: Final answer
    x = 163.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.