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Finding the Fourth Proportional to 844.80, 1,268.40 and 662.40

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Solution

The fourth proportional to 844.80, 1,268.40 and 662.40 is: 994.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.80 : 1,268.40 = 662.40 : x
  2. Step 2: Convert to fraction form
    844.80/1,268.40 = 662.40/x
  3. Step 3: Cross multiply
    844.80x = 1,268.40 × 662.40
  4. Step 4: Simplify right side
    844.80x = 840,188.16
  5. Step 5: Solve for x
    x = 840,188.16/844.80
  6. Step 6: Final answer
    x = 994.54

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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.