Home / 3,118.18-4,676.91-809.86

Finding the Fourth Proportional to 3,118.18, 4,676.91 and 809.86

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Solution

The fourth proportional to 3,118.18, 4,676.91 and 809.86 is: 1,214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.18 : 4,676.91 = 809.86 : x
  2. Step 2: Convert to fraction form
    3,118.18/4,676.91 = 809.86/x
  3. Step 3: Cross multiply
    3,118.18x = 4,676.91 × 809.86
  4. Step 4: Simplify right side
    3,118.18x = 3,787,642.33
  5. Step 5: Solve for x
    x = 3,787,642.33/3,118.18
  6. Step 6: Final answer
    x = 1,214.70

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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.