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Finding the Fourth Proportional to 5,456.40, 8,185.20 and 1,994.40

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Solution

The fourth proportional to 5,456.40, 8,185.20 and 1,994.40 is: 2,991.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,456.40 : 8,185.20 = 1,994.40 : x
  2. Step 2: Convert to fraction form
    5,456.40/8,185.20 = 1,994.40/x
  3. Step 3: Cross multiply
    5,456.40x = 8,185.20 × 1,994.40
  4. Step 4: Simplify right side
    5,456.40x = 16,324,562.88
  5. Step 5: Solve for x
    x = 16,324,562.88/5,456.40
  6. Step 6: Final answer
    x = 2,991.82

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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.