Home / 2,412.13-3,618.20-680.75

Finding the Fourth Proportional to 2,412.13, 3,618.20 and 680.75

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Solution

The fourth proportional to 2,412.13, 3,618.20 and 680.75 is: 1,021.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.13 : 3,618.20 = 680.75 : x
  2. Step 2: Convert to fraction form
    2,412.13/3,618.20 = 680.75/x
  3. Step 3: Cross multiply
    2,412.13x = 3,618.20 × 680.75
  4. Step 4: Simplify right side
    2,412.13x = 2,463,089.65
  5. Step 5: Solve for x
    x = 2,463,089.65/2,412.13
  6. Step 6: Final answer
    x = 1,021.13

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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.