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Finding the Fourth Proportional to 243.54, 365 and 140.67

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Solution

The fourth proportional to 243.54, 365 and 140.67 is: 210.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.54 : 365 = 140.67 : x
  2. Step 2: Convert to fraction form
    243.54/365 = 140.67/x
  3. Step 3: Cross multiply
    243.54x = 365 × 140.67
  4. Step 4: Simplify right side
    243.54x = 51,344.55
  5. Step 5: Solve for x
    x = 51,344.55/243.54
  6. Step 6: Final answer
    x = 210.83

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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.