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Finding the Fourth Proportional to 1,818.25, 2,728.46 and 664.09

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Solution

The fourth proportional to 1,818.25, 2,728.46 and 664.09 is: 996.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.25 : 2,728.46 = 664.09 : x
  2. Step 2: Convert to fraction form
    1,818.25/2,728.46 = 664.09/x
  3. Step 3: Cross multiply
    1,818.25x = 2,728.46 × 664.09
  4. Step 4: Simplify right side
    1,818.25x = 1,811,943.00
  5. Step 5: Solve for x
    x = 1,811,943.00/1,818.25
  6. Step 6: Final answer
    x = 996.53

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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.