Home / 2,107.24-3,160.86-720.68

Finding the Fourth Proportional to 2,107.24, 3,160.86 and 720.68

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Solution

The fourth proportional to 2,107.24, 3,160.86 and 720.68 is: 1,081.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.24 : 3,160.86 = 720.68 : x
  2. Step 2: Convert to fraction form
    2,107.24/3,160.86 = 720.68/x
  3. Step 3: Cross multiply
    2,107.24x = 3,160.86 × 720.68
  4. Step 4: Simplify right side
    2,107.24x = 2,277,968.58
  5. Step 5: Solve for x
    x = 2,277,968.58/2,107.24
  6. Step 6: Final answer
    x = 1,081.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.