Home / 3,187.47-4,780.43-1,338.61

Finding the Fourth Proportional to 3,187.47, 4,780.43 and 1,338.61

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Solution

The fourth proportional to 3,187.47, 4,780.43 and 1,338.61 is: 2,007.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.47 : 4,780.43 = 1,338.61 : x
  2. Step 2: Convert to fraction form
    3,187.47/4,780.43 = 1,338.61/x
  3. Step 3: Cross multiply
    3,187.47x = 4,780.43 × 1,338.61
  4. Step 4: Simplify right side
    3,187.47x = 6,399,131.40
  5. Step 5: Solve for x
    x = 6,399,131.40/3,187.47
  6. Step 6: Final answer
    x = 2,007.59

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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.