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Finding the Fourth Proportional to 243.90, 366.12 and 122.13

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Solution

The fourth proportional to 243.90, 366.12 and 122.13 is: 183.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.90 : 366.12 = 122.13 : x
  2. Step 2: Convert to fraction form
    243.90/366.12 = 122.13/x
  3. Step 3: Cross multiply
    243.90x = 366.12 × 122.13
  4. Step 4: Simplify right side
    243.90x = 44,714.24
  5. Step 5: Solve for x
    x = 44,714.24/243.90
  6. Step 6: Final answer
    x = 183.33

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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.