Home / 3,115.86-4,299.96-1,789.62

Finding the Fourth Proportional to 3,115.86, 4,299.96 and 1,789.62

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Solution

The fourth proportional to 3,115.86, 4,299.96 and 1,789.62 is: 2,469.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.86 : 4,299.96 = 1,789.62 : x
  2. Step 2: Convert to fraction form
    3,115.86/4,299.96 = 1,789.62/x
  3. Step 3: Cross multiply
    3,115.86x = 4,299.96 × 1,789.62
  4. Step 4: Simplify right side
    3,115.86x = 7,695,294.42
  5. Step 5: Solve for x
    x = 7,695,294.42/3,115.86
  6. Step 6: Final answer
    x = 2,469.72

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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.