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Finding the Fourth Proportional to 268.25, 369.95 and 212.85

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Solution

The fourth proportional to 268.25, 369.95 and 212.85 is: 293.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.25 : 369.95 = 212.85 : x
  2. Step 2: Convert to fraction form
    268.25/369.95 = 212.85/x
  3. Step 3: Cross multiply
    268.25x = 369.95 × 212.85
  4. Step 4: Simplify right side
    268.25x = 78,742.79
  5. Step 5: Solve for x
    x = 78,742.79/268.25
  6. Step 6: Final answer
    x = 293.55

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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.