Home / 3,112.08-4,668.72-1,380.72

Finding the Fourth Proportional to 3,112.08, 4,668.72 and 1,380.72

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Solution

The fourth proportional to 3,112.08, 4,668.72 and 1,380.72 is: 2,071.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.08 : 4,668.72 = 1,380.72 : x
  2. Step 2: Convert to fraction form
    3,112.08/4,668.72 = 1,380.72/x
  3. Step 3: Cross multiply
    3,112.08x = 4,668.72 × 1,380.72
  4. Step 4: Simplify right side
    3,112.08x = 6,446,195.08
  5. Step 5: Solve for x
    x = 6,446,195.08/3,112.08
  6. Step 6: Final answer
    x = 2,071.35

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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.