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Finding the Fourth Proportional to 2,808.63, 3,876.03 and 1,689.66

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Solution

The fourth proportional to 2,808.63, 3,876.03 and 1,689.66 is: 2,331.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.63 : 3,876.03 = 1,689.66 : x
  2. Step 2: Convert to fraction form
    2,808.63/3,876.03 = 1,689.66/x
  3. Step 3: Cross multiply
    2,808.63x = 3,876.03 × 1,689.66
  4. Step 4: Simplify right side
    2,808.63x = 6,549,172.85
  5. Step 5: Solve for x
    x = 6,549,172.85/2,808.63
  6. Step 6: Final answer
    x = 2,331.80

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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.