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Finding the Fourth Proportional to 968.62, 1,336.02 and 636.94

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Solution

The fourth proportional to 968.62, 1,336.02 and 636.94 is: 878.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.62 : 1,336.02 = 636.94 : x
  2. Step 2: Convert to fraction form
    968.62/1,336.02 = 636.94/x
  3. Step 3: Cross multiply
    968.62x = 1,336.02 × 636.94
  4. Step 4: Simplify right side
    968.62x = 850,964.58
  5. Step 5: Solve for x
    x = 850,964.58/968.62
  6. Step 6: Final answer
    x = 878.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.