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Finding the Fourth Proportional to 5,536.68, 8,305 and 1,640.78

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Solution

The fourth proportional to 5,536.68, 8,305 and 1,640.78 is: 2,461.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,536.68 : 8,305 = 1,640.78 : x
  2. Step 2: Convert to fraction form
    5,536.68/8,305 = 1,640.78/x
  3. Step 3: Cross multiply
    5,536.68x = 8,305 × 1,640.78
  4. Step 4: Simplify right side
    5,536.68x = 13,626,677.90
  5. Step 5: Solve for x
    x = 13,626,677.90/5,536.68
  6. Step 6: Final answer
    x = 2,461.16

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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.