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Finding the Fourth Proportional to 888.22, 1,330.89 and 644.91

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Solution

The fourth proportional to 888.22, 1,330.89 and 644.91 is: 966.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.22 : 1,330.89 = 644.91 : x
  2. Step 2: Convert to fraction form
    888.22/1,330.89 = 644.91/x
  3. Step 3: Cross multiply
    888.22x = 1,330.89 × 644.91
  4. Step 4: Simplify right side
    888.22x = 858,304.27
  5. Step 5: Solve for x
    x = 858,304.27/888.22
  6. Step 6: Final answer
    x = 966.32

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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.