Home / 3,138.58-4,331-1,722.04

Finding the Fourth Proportional to 3,138.58, 4,331 and 1,722.04

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Solution

The fourth proportional to 3,138.58, 4,331 and 1,722.04 is: 2,376.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.58 : 4,331 = 1,722.04 : x
  2. Step 2: Convert to fraction form
    3,138.58/4,331 = 1,722.04/x
  3. Step 3: Cross multiply
    3,138.58x = 4,331 × 1,722.04
  4. Step 4: Simplify right side
    3,138.58x = 7,458,155.24
  5. Step 5: Solve for x
    x = 7,458,155.24/3,138.58
  6. Step 6: Final answer
    x = 2,376.28

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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.