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Finding the Fourth Proportional to 216.07, 323.94 and 118.72

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Solution

The fourth proportional to 216.07, 323.94 and 118.72 is: 177.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.07 : 323.94 = 118.72 : x
  2. Step 2: Convert to fraction form
    216.07/323.94 = 118.72/x
  3. Step 3: Cross multiply
    216.07x = 323.94 × 118.72
  4. Step 4: Simplify right side
    216.07x = 38,458.16
  5. Step 5: Solve for x
    x = 38,458.16/216.07
  6. Step 6: Final answer
    x = 177.99

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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.