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Finding the Fourth Proportional to 2,679.38, 4,018.62 and 805.24

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Solution

The fourth proportional to 2,679.38, 4,018.62 and 805.24 is: 1,207.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.38 : 4,018.62 = 805.24 : x
  2. Step 2: Convert to fraction form
    2,679.38/4,018.62 = 805.24/x
  3. Step 3: Cross multiply
    2,679.38x = 4,018.62 × 805.24
  4. Step 4: Simplify right side
    2,679.38x = 3,235,953.57
  5. Step 5: Solve for x
    x = 3,235,953.57/2,679.38
  6. Step 6: Final answer
    x = 1,207.72

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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.