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Finding the Fourth Proportional to 323.69, 485.39 and 118.17

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Solution

The fourth proportional to 323.69, 485.39 and 118.17 is: 177.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.69 : 485.39 = 118.17 : x
  2. Step 2: Convert to fraction form
    323.69/485.39 = 118.17/x
  3. Step 3: Cross multiply
    323.69x = 485.39 × 118.17
  4. Step 4: Simplify right side
    323.69x = 57,358.83
  5. Step 5: Solve for x
    x = 57,358.83/323.69
  6. Step 6: Final answer
    x = 177.21

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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.