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Finding the Fourth Proportional to 243.16, 364.62 and 111.36

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Solution

The fourth proportional to 243.16, 364.62 and 111.36 is: 166.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.16 : 364.62 = 111.36 : x
  2. Step 2: Convert to fraction form
    243.16/364.62 = 111.36/x
  3. Step 3: Cross multiply
    243.16x = 364.62 × 111.36
  4. Step 4: Simplify right side
    243.16x = 40,604.08
  5. Step 5: Solve for x
    x = 40,604.08/243.16
  6. Step 6: Final answer
    x = 166.99

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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.