Home / 3,679.60-5,519.40-1,214.80

Finding the Fourth Proportional to 3,679.60, 5,519.40 and 1,214.80

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Solution

The fourth proportional to 3,679.60, 5,519.40 and 1,214.80 is: 1,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.60 : 5,519.40 = 1,214.80 : x
  2. Step 2: Convert to fraction form
    3,679.60/5,519.40 = 1,214.80/x
  3. Step 3: Cross multiply
    3,679.60x = 5,519.40 × 1,214.80
  4. Step 4: Simplify right side
    3,679.60x = 6,704,967.12
  5. Step 5: Solve for x
    x = 6,704,967.12/3,679.60
  6. Step 6: Final answer
    x = 1,822.20

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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.