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Finding the Fourth Proportional to 968.32, 1,336.32 and 636.49

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Solution

The fourth proportional to 968.32, 1,336.32 and 636.49 is: 878.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.32 : 1,336.32 = 636.49 : x
  2. Step 2: Convert to fraction form
    968.32/1,336.32 = 636.49/x
  3. Step 3: Cross multiply
    968.32x = 1,336.32 × 636.49
  4. Step 4: Simplify right side
    968.32x = 850,544.45
  5. Step 5: Solve for x
    x = 850,544.45/968.32
  6. Step 6: Final answer
    x = 878.38

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1.5x scale

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.