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Finding the Fourth Proportional to 268.49, 402.74 and 122.18

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Solution

The fourth proportional to 268.49, 402.74 and 122.18 is: 183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.49 : 402.74 = 122.18 : x
  2. Step 2: Convert to fraction form
    268.49/402.74 = 122.18/x
  3. Step 3: Cross multiply
    268.49x = 402.74 × 122.18
  4. Step 4: Simplify right side
    268.49x = 49,204.76
  5. Step 5: Solve for x
    x = 49,204.76/268.49
  6. Step 6: Final answer
    x = 183.27

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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.