Home / 3,970.92-5,479.65-2,292.20

Finding the Fourth Proportional to 3,970.92, 5,479.65 and 2,292.20

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Solution

The fourth proportional to 3,970.92, 5,479.65 and 2,292.20 is: 3,163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.92 : 5,479.65 = 2,292.20 : x
  2. Step 2: Convert to fraction form
    3,970.92/5,479.65 = 2,292.20/x
  3. Step 3: Cross multiply
    3,970.92x = 5,479.65 × 2,292.20
  4. Step 4: Simplify right side
    3,970.92x = 12,560,426.33
  5. Step 5: Solve for x
    x = 12,560,426.33/3,970.92
  6. Step 6: Final answer
    x = 3,163.10

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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.