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Finding the Fourth Proportional to 3,187.59, 4,401 and 1,994.39

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Solution

The fourth proportional to 3,187.59, 4,401 and 1,994.39 is: 2,753.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.59 : 4,401 = 1,994.39 : x
  2. Step 2: Convert to fraction form
    3,187.59/4,401 = 1,994.39/x
  3. Step 3: Cross multiply
    3,187.59x = 4,401 × 1,994.39
  4. Step 4: Simplify right side
    3,187.59x = 8,777,288.39
  5. Step 5: Solve for x
    x = 8,777,288.39/3,187.59
  6. Step 6: Final answer
    x = 2,753.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.