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Finding the Fourth Proportional to 242.44, 362.94 and 139.54

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Solution

The fourth proportional to 242.44, 362.94 and 139.54 is: 208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.44 : 362.94 = 139.54 : x
  2. Step 2: Convert to fraction form
    242.44/362.94 = 139.54/x
  3. Step 3: Cross multiply
    242.44x = 362.94 × 139.54
  4. Step 4: Simplify right side
    242.44x = 50,644.65
  5. Step 5: Solve for x
    x = 50,644.65/242.44
  6. Step 6: Final answer
    x = 208.90

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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.