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Finding the Fourth Proportional to 888.21, 1,333.80 and 668.84

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Solution

The fourth proportional to 888.21, 1,333.80 and 668.84 is: 1,004.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.21 : 1,333.80 = 668.84 : x
  2. Step 2: Convert to fraction form
    888.21/1,333.80 = 668.84/x
  3. Step 3: Cross multiply
    888.21x = 1,333.80 × 668.84
  4. Step 4: Simplify right side
    888.21x = 892,092.12
  5. Step 5: Solve for x
    x = 892,092.12/888.21
  6. Step 6: Final answer
    x = 1,004.37

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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.