Home / 3,438.90-5,159.38-1,359.20

Finding the Fourth Proportional to 3,438.90, 5,159.38 and 1,359.20

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Solution

The fourth proportional to 3,438.90, 5,159.38 and 1,359.20 is: 2,039.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.90 : 5,159.38 = 1,359.20 : x
  2. Step 2: Convert to fraction form
    3,438.90/5,159.38 = 1,359.20/x
  3. Step 3: Cross multiply
    3,438.90x = 5,159.38 × 1,359.20
  4. Step 4: Simplify right side
    3,438.90x = 7,012,629.30
  5. Step 5: Solve for x
    x = 7,012,629.30/3,438.90
  6. Step 6: Final answer
    x = 2,039.21

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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.