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Finding the Fourth Proportional to 3,327.80, 4,991.27 and 862.79

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Solution

The fourth proportional to 3,327.80, 4,991.27 and 862.79 is: 1,294.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,327.80 : 4,991.27 = 862.79 : x
  2. Step 2: Convert to fraction form
    3,327.80/4,991.27 = 862.79/x
  3. Step 3: Cross multiply
    3,327.80x = 4,991.27 × 862.79
  4. Step 4: Simplify right side
    3,327.80x = 4,306,388.57
  5. Step 5: Solve for x
    x = 4,306,388.57/3,327.80
  6. Step 6: Final answer
    x = 1,294.07

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1.5x scale

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.