Home / 3,679.40-5,519.10-1,214.30

Finding the Fourth Proportional to 3,679.40, 5,519.10 and 1,214.30

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Solution

The fourth proportional to 3,679.40, 5,519.10 and 1,214.30 is: 1,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.40 : 5,519.10 = 1,214.30 : x
  2. Step 2: Convert to fraction form
    3,679.40/5,519.10 = 1,214.30/x
  3. Step 3: Cross multiply
    3,679.40x = 5,519.10 × 1,214.30
  4. Step 4: Simplify right side
    3,679.40x = 6,701,843.13
  5. Step 5: Solve for x
    x = 6,701,843.13/3,679.40
  6. Step 6: Final answer
    x = 1,821.45

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Similar ratio
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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.