Home / 3,187.31-4,782.78-1,338.26

Finding the Fourth Proportional to 3,187.31, 4,782.78 and 1,338.26

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Solution

The fourth proportional to 3,187.31, 4,782.78 and 1,338.26 is: 2,008.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.31 : 4,782.78 = 1,338.26 : x
  2. Step 2: Convert to fraction form
    3,187.31/4,782.78 = 1,338.26/x
  3. Step 3: Cross multiply
    3,187.31x = 4,782.78 × 1,338.26
  4. Step 4: Simplify right side
    3,187.31x = 6,400,579.25
  5. Step 5: Solve for x
    x = 6,400,579.25/3,187.31
  6. Step 6: Final answer
    x = 2,008.15

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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.