Home / 2,620.20-3,930.30-1,583.40

Finding the Fourth Proportional to 2,620.20, 3,930.30 and 1,583.40

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Solution

The fourth proportional to 2,620.20, 3,930.30 and 1,583.40 is: 2,375.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.20 : 3,930.30 = 1,583.40 : x
  2. Step 2: Convert to fraction form
    2,620.20/3,930.30 = 1,583.40/x
  3. Step 3: Cross multiply
    2,620.20x = 3,930.30 × 1,583.40
  4. Step 4: Simplify right side
    2,620.20x = 6,223,237.02
  5. Step 5: Solve for x
    x = 6,223,237.02/2,620.20
  6. Step 6: Final answer
    x = 2,375.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.