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Finding the Fourth Proportional to 242.09, 363.06 and 139.42

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Solution

The fourth proportional to 242.09, 363.06 and 139.42 is: 209.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.09 : 363.06 = 139.42 : x
  2. Step 2: Convert to fraction form
    242.09/363.06 = 139.42/x
  3. Step 3: Cross multiply
    242.09x = 363.06 × 139.42
  4. Step 4: Simplify right side
    242.09x = 50,619.19
  5. Step 5: Solve for x
    x = 50,619.19/242.09
  6. Step 6: Final answer
    x = 209.09

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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.