Home / 3,620.98-5,432.26-1,399.78

Finding the Fourth Proportional to 3,620.98, 5,432.26 and 1,399.78

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Solution

The fourth proportional to 3,620.98, 5,432.26 and 1,399.78 is: 2,099.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.98 : 5,432.26 = 1,399.78 : x
  2. Step 2: Convert to fraction form
    3,620.98/5,432.26 = 1,399.78/x
  3. Step 3: Cross multiply
    3,620.98x = 5,432.26 × 1,399.78
  4. Step 4: Simplify right side
    3,620.98x = 7,603,968.90
  5. Step 5: Solve for x
    x = 7,603,968.90/3,620.98
  6. Step 6: Final answer
    x = 2,099.98

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1.5x scale

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.