Home / 2,825.80-4,239.40-878.04

Finding the Fourth Proportional to 2,825.80, 4,239.40 and 878.04

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Solution

The fourth proportional to 2,825.80, 4,239.40 and 878.04 is: 1,317.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.80 : 4,239.40 = 878.04 : x
  2. Step 2: Convert to fraction form
    2,825.80/4,239.40 = 878.04/x
  3. Step 3: Cross multiply
    2,825.80x = 4,239.40 × 878.04
  4. Step 4: Simplify right side
    2,825.80x = 3,722,362.78
  5. Step 5: Solve for x
    x = 3,722,362.78/2,825.80
  6. Step 6: Final answer
    x = 1,317.28

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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.