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Finding the Fourth Proportional to 216.65, 298.98 and 118.41

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Solution

The fourth proportional to 216.65, 298.98 and 118.41 is: 163.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.65 : 298.98 = 118.41 : x
  2. Step 2: Convert to fraction form
    216.65/298.98 = 118.41/x
  3. Step 3: Cross multiply
    216.65x = 298.98 × 118.41
  4. Step 4: Simplify right side
    216.65x = 35,400.50
  5. Step 5: Solve for x
    x = 35,400.50/216.65
  6. Step 6: Final answer
    x = 163.40

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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.