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Finding the Fourth Proportional to 1,994.06, 2,991.09 and 839.06

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Solution

The fourth proportional to 1,994.06, 2,991.09 and 839.06 is: 1,258.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.06 : 2,991.09 = 839.06 : x
  2. Step 2: Convert to fraction form
    1,994.06/2,991.09 = 839.06/x
  3. Step 3: Cross multiply
    1,994.06x = 2,991.09 × 839.06
  4. Step 4: Simplify right side
    1,994.06x = 2,509,703.98
  5. Step 5: Solve for x
    x = 2,509,703.98/1,994.06
  6. Step 6: Final answer
    x = 1,258.59

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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.