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Finding the Fourth Proportional to 242.69, 363.47 and 138.33

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Solution

The fourth proportional to 242.69, 363.47 and 138.33 is: 207.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.69 : 363.47 = 138.33 : x
  2. Step 2: Convert to fraction form
    242.69/363.47 = 138.33/x
  3. Step 3: Cross multiply
    242.69x = 363.47 × 138.33
  4. Step 4: Simplify right side
    242.69x = 50,278.11
  5. Step 5: Solve for x
    x = 50,278.11/242.69
  6. Step 6: Final answer
    x = 207.17

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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.