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Finding the Fourth Proportional to 242.67, 363.41 and 127.21

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Solution

The fourth proportional to 242.67, 363.41 and 127.21 is: 190.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.67 : 363.41 = 127.21 : x
  2. Step 2: Convert to fraction form
    242.67/363.41 = 127.21/x
  3. Step 3: Cross multiply
    242.67x = 363.41 × 127.21
  4. Step 4: Simplify right side
    242.67x = 46,229.00
  5. Step 5: Solve for x
    x = 46,229.00/242.67
  6. Step 6: Final answer
    x = 190.50

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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.