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Finding the Fourth Proportional to 268.78, 403.07 and 106.38

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Solution

The fourth proportional to 268.78, 403.07 and 106.38 is: 159.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.78 : 403.07 = 106.38 : x
  2. Step 2: Convert to fraction form
    268.78/403.07 = 106.38/x
  3. Step 3: Cross multiply
    268.78x = 403.07 × 106.38
  4. Step 4: Simplify right side
    268.78x = 42,878.59
  5. Step 5: Solve for x
    x = 42,878.59/268.78
  6. Step 6: Final answer
    x = 159.53

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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.