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Finding the Fourth Proportional to 677.96, 1,016.78 and 190.88

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Solution

The fourth proportional to 677.96, 1,016.78 and 190.88 is: 286.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.96 : 1,016.78 = 190.88 : x
  2. Step 2: Convert to fraction form
    677.96/1,016.78 = 190.88/x
  3. Step 3: Cross multiply
    677.96x = 1,016.78 × 190.88
  4. Step 4: Simplify right side
    677.96x = 194,082.97
  5. Step 5: Solve for x
    x = 194,082.97/677.96
  6. Step 6: Final answer
    x = 286.27

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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.