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Finding the Fourth Proportional to 268.49, 402.80 and 191.26

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Solution

The fourth proportional to 268.49, 402.80 and 191.26 is: 286.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.49 : 402.80 = 191.26 : x
  2. Step 2: Convert to fraction form
    268.49/402.80 = 191.26/x
  3. Step 3: Cross multiply
    268.49x = 402.80 × 191.26
  4. Step 4: Simplify right side
    268.49x = 77,040.51
  5. Step 5: Solve for x
    x = 77,040.51/268.49
  6. Step 6: Final answer
    x = 286.94

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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.