Home / 3,106.72-4,287.32-1,690.41

Finding the Fourth Proportional to 3,106.72, 4,287.32 and 1,690.41

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Solution

The fourth proportional to 3,106.72, 4,287.32 and 1,690.41 is: 2,332.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.72 : 4,287.32 = 1,690.41 : x
  2. Step 2: Convert to fraction form
    3,106.72/4,287.32 = 1,690.41/x
  3. Step 3: Cross multiply
    3,106.72x = 4,287.32 × 1,690.41
  4. Step 4: Simplify right side
    3,106.72x = 7,247,310.04
  5. Step 5: Solve for x
    x = 7,247,310.04/3,106.72
  6. Step 6: Final answer
    x = 2,332.79

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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.