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Finding the Fourth Proportional to 884.75, 1,326.76 and 639.23

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Solution

The fourth proportional to 884.75, 1,326.76 and 639.23 is: 958.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.75 : 1,326.76 = 639.23 : x
  2. Step 2: Convert to fraction form
    884.75/1,326.76 = 639.23/x
  3. Step 3: Cross multiply
    884.75x = 1,326.76 × 639.23
  4. Step 4: Simplify right side
    884.75x = 848,096.56
  5. Step 5: Solve for x
    x = 848,096.56/884.75
  6. Step 6: Final answer
    x = 958.58

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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.