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Finding the Fourth Proportional to 3,368.92, 5,053.32 and 1,991.80

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Solution

The fourth proportional to 3,368.92, 5,053.32 and 1,991.80 is: 2,987.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,368.92 : 5,053.32 = 1,991.80 : x
  2. Step 2: Convert to fraction form
    3,368.92/5,053.32 = 1,991.80/x
  3. Step 3: Cross multiply
    3,368.92x = 5,053.32 × 1,991.80
  4. Step 4: Simplify right side
    3,368.92x = 10,065,202.78
  5. Step 5: Solve for x
    x = 10,065,202.78/3,368.92
  6. Step 6: Final answer
    x = 2,987.66

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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.