Home / 1,672.20-2,305.86-1,081.68

Finding the Fourth Proportional to 1,672.20, 2,305.86 and 1,081.68

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Solution

The fourth proportional to 1,672.20, 2,305.86 and 1,081.68 is: 1,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.20 : 2,305.86 = 1,081.68 : x
  2. Step 2: Convert to fraction form
    1,672.20/2,305.86 = 1,081.68/x
  3. Step 3: Cross multiply
    1,672.20x = 2,305.86 × 1,081.68
  4. Step 4: Simplify right side
    1,672.20x = 2,494,202.64
  5. Step 5: Solve for x
    x = 2,494,202.64/1,672.20
  6. Step 6: Final answer
    x = 1,491.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.