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Finding the Fourth Proportional to 243.58, 365.52 and 121.90

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Solution

The fourth proportional to 243.58, 365.52 and 121.90 is: 182.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.58 : 365.52 = 121.90 : x
  2. Step 2: Convert to fraction form
    243.58/365.52 = 121.90/x
  3. Step 3: Cross multiply
    243.58x = 365.52 × 121.90
  4. Step 4: Simplify right side
    243.58x = 44,556.89
  5. Step 5: Solve for x
    x = 44,556.89/243.58
  6. Step 6: Final answer
    x = 182.93

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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.