Home / 1,990.99-2,747.85-1,151.53

Finding the Fourth Proportional to 1,990.99, 2,747.85 and 1,151.53

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Solution

The fourth proportional to 1,990.99, 2,747.85 and 1,151.53 is: 1,589.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.99 : 2,747.85 = 1,151.53 : x
  2. Step 2: Convert to fraction form
    1,990.99/2,747.85 = 1,151.53/x
  3. Step 3: Cross multiply
    1,990.99x = 2,747.85 × 1,151.53
  4. Step 4: Simplify right side
    1,990.99x = 3,164,231.71
  5. Step 5: Solve for x
    x = 3,164,231.71/1,990.99
  6. Step 6: Final answer
    x = 1,589.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.