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Finding the Fourth Proportional to 268.12, 403.72 and 196.48

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Solution

The fourth proportional to 268.12, 403.72 and 196.48 is: 295.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.12 : 403.72 = 196.48 : x
  2. Step 2: Convert to fraction form
    268.12/403.72 = 196.48/x
  3. Step 3: Cross multiply
    268.12x = 403.72 × 196.48
  4. Step 4: Simplify right side
    268.12x = 79,322.91
  5. Step 5: Solve for x
    x = 79,322.91/268.12
  6. Step 6: Final answer
    x = 295.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.