Home / 3,970.20-5,479.09-2,201.77

Finding the Fourth Proportional to 3,970.20, 5,479.09 and 2,201.77

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Solution

The fourth proportional to 3,970.20, 5,479.09 and 2,201.77 is: 3,038.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.20 : 5,479.09 = 2,201.77 : x
  2. Step 2: Convert to fraction form
    3,970.20/5,479.09 = 2,201.77/x
  3. Step 3: Cross multiply
    3,970.20x = 5,479.09 × 2,201.77
  4. Step 4: Simplify right side
    3,970.20x = 12,063,668.59
  5. Step 5: Solve for x
    x = 12,063,668.59/3,970.20
  6. Step 6: Final answer
    x = 3,038.55

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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.