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Finding the Fourth Proportional to 268.74, 402.49 and 164.65

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Solution

The fourth proportional to 268.74, 402.49 and 164.65 is: 246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.74 : 402.49 = 164.65 : x
  2. Step 2: Convert to fraction form
    268.74/402.49 = 164.65/x
  3. Step 3: Cross multiply
    268.74x = 402.49 × 164.65
  4. Step 4: Simplify right side
    268.74x = 66,269.98
  5. Step 5: Solve for x
    x = 66,269.98/268.74
  6. Step 6: Final answer
    x = 246.60

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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.