Home / 3,107.12-4,287.87-1,690.83

Finding the Fourth Proportional to 3,107.12, 4,287.87 and 1,690.83

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Solution

The fourth proportional to 3,107.12, 4,287.87 and 1,690.83 is: 2,333.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.12 : 4,287.87 = 1,690.83 : x
  2. Step 2: Convert to fraction form
    3,107.12/4,287.87 = 1,690.83/x
  3. Step 3: Cross multiply
    3,107.12x = 4,287.87 × 1,690.83
  4. Step 4: Simplify right side
    3,107.12x = 7,250,059.23
  5. Step 5: Solve for x
    x = 7,250,059.23/3,107.12
  6. Step 6: Final answer
    x = 2,333.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.