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Finding the Fourth Proportional to 492.19, 679.21 and 268.11

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Solution

The fourth proportional to 492.19, 679.21 and 268.11 is: 369.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.19 : 679.21 = 268.11 : x
  2. Step 2: Convert to fraction form
    492.19/679.21 = 268.11/x
  3. Step 3: Cross multiply
    492.19x = 679.21 × 268.11
  4. Step 4: Simplify right side
    492.19x = 182,104.02
  5. Step 5: Solve for x
    x = 182,104.02/492.19
  6. Step 6: Final answer
    x = 369.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.