Home / 3,419.28-5,128.71-1,338.90

Finding the Fourth Proportional to 3,419.28, 5,128.71 and 1,338.90

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Solution

The fourth proportional to 3,419.28, 5,128.71 and 1,338.90 is: 2,008.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.28 : 5,128.71 = 1,338.90 : x
  2. Step 2: Convert to fraction form
    3,419.28/5,128.71 = 1,338.90/x
  3. Step 3: Cross multiply
    3,419.28x = 5,128.71 × 1,338.90
  4. Step 4: Simplify right side
    3,419.28x = 6,866,829.82
  5. Step 5: Solve for x
    x = 6,866,829.82/3,419.28
  6. Step 6: Final answer
    x = 2,008.27

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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.