Home / 3,919.20-5,408.78-2,590.60

Finding the Fourth Proportional to 3,919.20, 5,408.78 and 2,590.60

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Solution

The fourth proportional to 3,919.20, 5,408.78 and 2,590.60 is: 3,575.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.20 : 5,408.78 = 2,590.60 : x
  2. Step 2: Convert to fraction form
    3,919.20/5,408.78 = 2,590.60/x
  3. Step 3: Cross multiply
    3,919.20x = 5,408.78 × 2,590.60
  4. Step 4: Simplify right side
    3,919.20x = 14,011,985.47
  5. Step 5: Solve for x
    x = 14,011,985.47/3,919.20
  6. Step 6: Final answer
    x = 3,575.22

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1.5x scale

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.