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Finding the Fourth Proportional to 968.18, 1,336.54 and 636.62

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Solution

The fourth proportional to 968.18, 1,336.54 and 636.62 is: 878.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.18 : 1,336.54 = 636.62 : x
  2. Step 2: Convert to fraction form
    968.18/1,336.54 = 636.62/x
  3. Step 3: Cross multiply
    968.18x = 1,336.54 × 636.62
  4. Step 4: Simplify right side
    968.18x = 850,868.09
  5. Step 5: Solve for x
    x = 850,868.09/968.18
  6. Step 6: Final answer
    x = 878.83

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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.