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Finding the Fourth Proportional to 1,994.40, 2,991.58 and 607.73

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Solution

The fourth proportional to 1,994.40, 2,991.58 and 607.73 is: 911.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.40 : 2,991.58 = 607.73 : x
  2. Step 2: Convert to fraction form
    1,994.40/2,991.58 = 607.73/x
  3. Step 3: Cross multiply
    1,994.40x = 2,991.58 × 607.73
  4. Step 4: Simplify right side
    1,994.40x = 1,818,056.44
  5. Step 5: Solve for x
    x = 1,818,056.44/1,994.40
  6. Step 6: Final answer
    x = 911.58

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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.