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Finding the Fourth Proportional to 1,993.98, 2,991.40 and 607.32

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Solution

The fourth proportional to 1,993.98, 2,991.40 and 607.32 is: 911.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.98 : 2,991.40 = 607.32 : x
  2. Step 2: Convert to fraction form
    1,993.98/2,991.40 = 607.32/x
  3. Step 3: Cross multiply
    1,993.98x = 2,991.40 × 607.32
  4. Step 4: Simplify right side
    1,993.98x = 1,816,737.05
  5. Step 5: Solve for x
    x = 1,816,737.05/1,993.98
  6. Step 6: Final answer
    x = 911.11

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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.