Home / 2,412.16-3,618.23-680.78

Finding the Fourth Proportional to 2,412.16, 3,618.23 and 680.78

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Solution

The fourth proportional to 2,412.16, 3,618.23 and 680.78 is: 1,021.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.16 : 3,618.23 = 680.78 : x
  2. Step 2: Convert to fraction form
    2,412.16/3,618.23 = 680.78/x
  3. Step 3: Cross multiply
    2,412.16x = 3,618.23 × 680.78
  4. Step 4: Simplify right side
    2,412.16x = 2,463,218.62
  5. Step 5: Solve for x
    x = 2,463,218.62/2,412.16
  6. Step 6: Final answer
    x = 1,021.17

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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.