Home / 3,518.55-5,278.19-1,209.75

Finding the Fourth Proportional to 3,518.55, 5,278.19 and 1,209.75

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Solution

The fourth proportional to 3,518.55, 5,278.19 and 1,209.75 is: 1,814.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.55 : 5,278.19 = 1,209.75 : x
  2. Step 2: Convert to fraction form
    3,518.55/5,278.19 = 1,209.75/x
  3. Step 3: Cross multiply
    3,518.55x = 5,278.19 × 1,209.75
  4. Step 4: Simplify right side
    3,518.55x = 6,385,284.30
  5. Step 5: Solve for x
    x = 6,385,284.30/3,518.55
  6. Step 6: Final answer
    x = 1,814.75

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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.