Home / 2,578.20-3,557.92-1,399.28

Finding the Fourth Proportional to 2,578.20, 3,557.92 and 1,399.28

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Solution

The fourth proportional to 2,578.20, 3,557.92 and 1,399.28 is: 1,931.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.20 : 3,557.92 = 1,399.28 : x
  2. Step 2: Convert to fraction form
    2,578.20/3,557.92 = 1,399.28/x
  3. Step 3: Cross multiply
    2,578.20x = 3,557.92 × 1,399.28
  4. Step 4: Simplify right side
    2,578.20x = 4,978,526.30
  5. Step 5: Solve for x
    x = 4,978,526.30/2,578.20
  6. Step 6: Final answer
    x = 1,931.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.