Home / 2,979.35-4,111.36-1,720.44

Finding the Fourth Proportional to 2,979.35, 4,111.36 and 1,720.44

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Solution

The fourth proportional to 2,979.35, 4,111.36 and 1,720.44 is: 2,374.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.35 : 4,111.36 = 1,720.44 : x
  2. Step 2: Convert to fraction form
    2,979.35/4,111.36 = 1,720.44/x
  3. Step 3: Cross multiply
    2,979.35x = 4,111.36 × 1,720.44
  4. Step 4: Simplify right side
    2,979.35x = 7,073,343.90
  5. Step 5: Solve for x
    x = 7,073,343.90/2,979.35
  6. Step 6: Final answer
    x = 2,374.12

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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.