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Finding the Fourth Proportional to 968.13, 1,336.12 and 636.75

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Solution

The fourth proportional to 968.13, 1,336.12 and 636.75 is: 878.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.13 : 1,336.12 = 636.75 : x
  2. Step 2: Convert to fraction form
    968.13/1,336.12 = 636.75/x
  3. Step 3: Cross multiply
    968.13x = 1,336.12 × 636.75
  4. Step 4: Simplify right side
    968.13x = 850,774.41
  5. Step 5: Solve for x
    x = 850,774.41/968.13
  6. Step 6: Final answer
    x = 878.78

Related Problems

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Half scale
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Double scale
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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.