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Finding the Fourth Proportional to 216.50, 298.75 and 118.23

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Solution

The fourth proportional to 216.50, 298.75 and 118.23 is: 163.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.50 : 298.75 = 118.23 : x
  2. Step 2: Convert to fraction form
    216.50/298.75 = 118.23/x
  3. Step 3: Cross multiply
    216.50x = 298.75 × 118.23
  4. Step 4: Simplify right side
    216.50x = 35,320.92
  5. Step 5: Solve for x
    x = 35,320.92/216.50
  6. Step 6: Final answer
    x = 163.15

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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.