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Finding the Fourth Proportional to 801.12, 1,200.48 and 636.96

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Solution

The fourth proportional to 801.12, 1,200.48 and 636.96 is: 954.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.12 : 1,200.48 = 636.96 : x
  2. Step 2: Convert to fraction form
    801.12/1,200.48 = 636.96/x
  3. Step 3: Cross multiply
    801.12x = 1,200.48 × 636.96
  4. Step 4: Simplify right side
    801.12x = 764,657.74
  5. Step 5: Solve for x
    x = 764,657.74/801.12
  6. Step 6: Final answer
    x = 954.49

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1.5x scale

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.