Home / 1,990.14-2,984.67-691.44

Finding the Fourth Proportional to 1,990.14, 2,984.67 and 691.44

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Solution

The fourth proportional to 1,990.14, 2,984.67 and 691.44 is: 1,036.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.14 : 2,984.67 = 691.44 : x
  2. Step 2: Convert to fraction form
    1,990.14/2,984.67 = 691.44/x
  3. Step 3: Cross multiply
    1,990.14x = 2,984.67 × 691.44
  4. Step 4: Simplify right side
    1,990.14x = 2,063,720.22
  5. Step 5: Solve for x
    x = 2,063,720.22/1,990.14
  6. Step 6: Final answer
    x = 1,036.97

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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.