Home / 3,291.40-4,941.90-2,321.80

Finding the Fourth Proportional to 3,291.40, 4,941.90 and 2,321.80

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Solution

The fourth proportional to 3,291.40, 4,941.90 and 2,321.80 is: 3,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.40 : 4,941.90 = 2,321.80 : x
  2. Step 2: Convert to fraction form
    3,291.40/4,941.90 = 2,321.80/x
  3. Step 3: Cross multiply
    3,291.40x = 4,941.90 × 2,321.80
  4. Step 4: Simplify right side
    3,291.40x = 11,474,103.42
  5. Step 5: Solve for x
    x = 11,474,103.42/3,291.40
  6. Step 6: Final answer
    x = 3,486.09

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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.