Home / 3,119.68-4,305-1,722.16

Finding the Fourth Proportional to 3,119.68, 4,305 and 1,722.16

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Solution

The fourth proportional to 3,119.68, 4,305 and 1,722.16 is: 2,376.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.68 : 4,305 = 1,722.16 : x
  2. Step 2: Convert to fraction form
    3,119.68/4,305 = 1,722.16/x
  3. Step 3: Cross multiply
    3,119.68x = 4,305 × 1,722.16
  4. Step 4: Simplify right side
    3,119.68x = 7,413,898.80
  5. Step 5: Solve for x
    x = 7,413,898.80/3,119.68
  6. Step 6: Final answer
    x = 2,376.49

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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.