Home / 1,990.48-2,747.21-1,151.05

Finding the Fourth Proportional to 1,990.48, 2,747.21 and 1,151.05

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Solution

The fourth proportional to 1,990.48, 2,747.21 and 1,151.05 is: 1,588.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.48 : 2,747.21 = 1,151.05 : x
  2. Step 2: Convert to fraction form
    1,990.48/2,747.21 = 1,151.05/x
  3. Step 3: Cross multiply
    1,990.48x = 2,747.21 × 1,151.05
  4. Step 4: Simplify right side
    1,990.48x = 3,162,176.07
  5. Step 5: Solve for x
    x = 3,162,176.07/1,990.48
  6. Step 6: Final answer
    x = 1,588.65

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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.