Home / 3,139.80-4,709.37-1,291.11

Finding the Fourth Proportional to 3,139.80, 4,709.37 and 1,291.11

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Solution

The fourth proportional to 3,139.80, 4,709.37 and 1,291.11 is: 1,936.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.80 : 4,709.37 = 1,291.11 : x
  2. Step 2: Convert to fraction form
    3,139.80/4,709.37 = 1,291.11/x
  3. Step 3: Cross multiply
    3,139.80x = 4,709.37 × 1,291.11
  4. Step 4: Simplify right side
    3,139.80x = 6,080,314.70
  5. Step 5: Solve for x
    x = 6,080,314.70/3,139.80
  6. Step 6: Final answer
    x = 1,936.53

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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.