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Finding the Fourth Proportional to 216.09, 323.84 and 79.00

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Solution

The fourth proportional to 216.09, 323.84 and 79.00 is: 118.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.09 : 323.84 = 79.00 : x
  2. Step 2: Convert to fraction form
    216.09/323.84 = 79.00/x
  3. Step 3: Cross multiply
    216.09x = 323.84 × 79.00
  4. Step 4: Simplify right side
    216.09x = 25,583.96
  5. Step 5: Solve for x
    x = 25,583.96/216.09
  6. Step 6: Final answer
    x = 118.39

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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.