Home / 2,867.16-4,290.91-1,990.65

Finding the Fourth Proportional to 2,867.16, 4,290.91 and 1,990.65

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Solution

The fourth proportional to 2,867.16, 4,290.91 and 1,990.65 is: 2,979.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.16 : 4,290.91 = 1,990.65 : x
  2. Step 2: Convert to fraction form
    2,867.16/4,290.91 = 1,990.65/x
  3. Step 3: Cross multiply
    2,867.16x = 4,290.91 × 1,990.65
  4. Step 4: Simplify right side
    2,867.16x = 8,541,699.99
  5. Step 5: Solve for x
    x = 8,541,699.99/2,867.16
  6. Step 6: Final answer
    x = 2,979.15

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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.