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Finding the Fourth Proportional to 2,662.90, 3,994.53 and 814.18

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Solution

The fourth proportional to 2,662.90, 3,994.53 and 814.18 is: 1,221.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,662.90 : 3,994.53 = 814.18 : x
  2. Step 2: Convert to fraction form
    2,662.90/3,994.53 = 814.18/x
  3. Step 3: Cross multiply
    2,662.90x = 3,994.53 × 814.18
  4. Step 4: Simplify right side
    2,662.90x = 3,252,266.44
  5. Step 5: Solve for x
    x = 3,252,266.44/2,662.90
  6. Step 6: Final answer
    x = 1,221.33

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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.