Home / 3,930.40-5,426.19-2,605.90

Finding the Fourth Proportional to 3,930.40, 5,426.19 and 2,605.90

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Solution

The fourth proportional to 3,930.40, 5,426.19 and 2,605.90 is: 3,597.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.40 : 5,426.19 = 2,605.90 : x
  2. Step 2: Convert to fraction form
    3,930.40/5,426.19 = 2,605.90/x
  3. Step 3: Cross multiply
    3,930.40x = 5,426.19 × 2,605.90
  4. Step 4: Simplify right side
    3,930.40x = 14,140,104.73
  5. Step 5: Solve for x
    x = 14,140,104.73/3,930.40
  6. Step 6: Final answer
    x = 3,597.62

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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.