Home / 2,690.20-4,040.10-2,603.80

Finding the Fourth Proportional to 2,690.20, 4,040.10 and 2,603.80

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Solution

The fourth proportional to 2,690.20, 4,040.10 and 2,603.80 is: 3,910.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.20 : 4,040.10 = 2,603.80 : x
  2. Step 2: Convert to fraction form
    2,690.20/4,040.10 = 2,603.80/x
  3. Step 3: Cross multiply
    2,690.20x = 4,040.10 × 2,603.80
  4. Step 4: Simplify right side
    2,690.20x = 10,519,612.38
  5. Step 5: Solve for x
    x = 10,519,612.38/2,690.20
  6. Step 6: Final answer
    x = 3,910.35

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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.