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Finding the Fourth Proportional to 2,612.68, 3,919.25 and 664.88

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Solution

The fourth proportional to 2,612.68, 3,919.25 and 664.88 is: 997.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.68 : 3,919.25 = 664.88 : x
  2. Step 2: Convert to fraction form
    2,612.68/3,919.25 = 664.88/x
  3. Step 3: Cross multiply
    2,612.68x = 3,919.25 × 664.88
  4. Step 4: Simplify right side
    2,612.68x = 2,605,813.01
  5. Step 5: Solve for x
    x = 2,605,813.01/2,612.68
  6. Step 6: Final answer
    x = 997.37

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1.5x scale

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.