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Finding the Fourth Proportional to 2,616.66, 3,924.90 and 668.88

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Solution

The fourth proportional to 2,616.66, 3,924.90 and 668.88 is: 1,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,616.66 : 3,924.90 = 668.88 : x
  2. Step 2: Convert to fraction form
    2,616.66/3,924.90 = 668.88/x
  3. Step 3: Cross multiply
    2,616.66x = 3,924.90 × 668.88
  4. Step 4: Simplify right side
    2,616.66x = 2,625,287.11
  5. Step 5: Solve for x
    x = 2,625,287.11/2,616.66
  6. Step 6: Final answer
    x = 1,003.30

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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.