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Finding the Fourth Proportional to 1,679.86, 2,311.77 and 1,631.38

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Solution

The fourth proportional to 1,679.86, 2,311.77 and 1,631.38 is: 2,245.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.86 : 2,311.77 = 1,631.38 : x
  2. Step 2: Convert to fraction form
    1,679.86/2,311.77 = 1,631.38/x
  3. Step 3: Cross multiply
    1,679.86x = 2,311.77 × 1,631.38
  4. Step 4: Simplify right side
    1,679.86x = 3,771,375.34
  5. Step 5: Solve for x
    x = 3,771,375.34/1,679.86
  6. Step 6: Final answer
    x = 2,245.05

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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.