Home / 2,979.28-4,111.38-1,720.60

Finding the Fourth Proportional to 2,979.28, 4,111.38 and 1,720.60

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Solution

The fourth proportional to 2,979.28, 4,111.38 and 1,720.60 is: 2,374.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.28 : 4,111.38 = 1,720.60 : x
  2. Step 2: Convert to fraction form
    2,979.28/4,111.38 = 1,720.60/x
  3. Step 3: Cross multiply
    2,979.28x = 4,111.38 × 1,720.60
  4. Step 4: Simplify right side
    2,979.28x = 7,074,040.43
  5. Step 5: Solve for x
    x = 7,074,040.43/2,979.28
  6. Step 6: Final answer
    x = 2,374.41

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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.