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Finding the Fourth Proportional to 1,994.37, 2,991.76 and 762.82

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Solution

The fourth proportional to 1,994.37, 2,991.76 and 762.82 is: 1,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.37 : 2,991.76 = 762.82 : x
  2. Step 2: Convert to fraction form
    1,994.37/2,991.76 = 762.82/x
  3. Step 3: Cross multiply
    1,994.37x = 2,991.76 × 762.82
  4. Step 4: Simplify right side
    1,994.37x = 2,282,167.12
  5. Step 5: Solve for x
    x = 2,282,167.12/1,994.37
  6. Step 6: Final answer
    x = 1,144.30

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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.