Home / 2,865.30-3,949.32-1,979.16

Finding the Fourth Proportional to 2,865.30, 3,949.32 and 1,979.16

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Solution

The fourth proportional to 2,865.30, 3,949.32 and 1,979.16 is: 2,727.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.30 : 3,949.32 = 1,979.16 : x
  2. Step 2: Convert to fraction form
    2,865.30/3,949.32 = 1,979.16/x
  3. Step 3: Cross multiply
    2,865.30x = 3,949.32 × 1,979.16
  4. Step 4: Simplify right side
    2,865.30x = 7,816,336.17
  5. Step 5: Solve for x
    x = 7,816,336.17/2,865.30
  6. Step 6: Final answer
    x = 2,727.93

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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.