Home / 3,970.30-5,479.61-2,291.38

Finding the Fourth Proportional to 3,970.30, 5,479.61 and 2,291.38

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Solution

The fourth proportional to 3,970.30, 5,479.61 and 2,291.38 is: 3,162.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.30 : 5,479.61 = 2,291.38 : x
  2. Step 2: Convert to fraction form
    3,970.30/5,479.61 = 2,291.38/x
  3. Step 3: Cross multiply
    3,970.30x = 5,479.61 × 2,291.38
  4. Step 4: Simplify right side
    3,970.30x = 12,555,868.76
  5. Step 5: Solve for x
    x = 12,555,868.76/3,970.30
  6. Step 6: Final answer
    x = 3,162.45

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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.