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Finding the Fourth Proportional to 242.65, 363.87 and 69.28

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Solution

The fourth proportional to 242.65, 363.87 and 69.28 is: 103.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.65 : 363.87 = 69.28 : x
  2. Step 2: Convert to fraction form
    242.65/363.87 = 69.28/x
  3. Step 3: Cross multiply
    242.65x = 363.87 × 69.28
  4. Step 4: Simplify right side
    242.65x = 25,210.08
  5. Step 5: Solve for x
    x = 25,210.08/242.65
  6. Step 6: Final answer
    x = 103.89

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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.