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Finding the Fourth Proportional to 1,788.66, 2,682.74 and 863.43

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Solution

The fourth proportional to 1,788.66, 2,682.74 and 863.43 is: 1,295.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.66 : 2,682.74 = 863.43 : x
  2. Step 2: Convert to fraction form
    1,788.66/2,682.74 = 863.43/x
  3. Step 3: Cross multiply
    1,788.66x = 2,682.74 × 863.43
  4. Step 4: Simplify right side
    1,788.66x = 2,316,353.88
  5. Step 5: Solve for x
    x = 2,316,353.88/1,788.66
  6. Step 6: Final answer
    x = 1,295.02

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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.