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Finding the Fourth Proportional to 1,991.79, 2,985.84 and 1,016.73

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Solution

The fourth proportional to 1,991.79, 2,985.84 and 1,016.73 is: 1,524.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.79 : 2,985.84 = 1,016.73 : x
  2. Step 2: Convert to fraction form
    1,991.79/2,985.84 = 1,016.73/x
  3. Step 3: Cross multiply
    1,991.79x = 2,985.84 × 1,016.73
  4. Step 4: Simplify right side
    1,991.79x = 3,035,793.10
  5. Step 5: Solve for x
    x = 3,035,793.10/1,991.79
  6. Step 6: Final answer
    x = 1,524.15

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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.