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Finding the Fourth Proportional to 627.60, 939.76 and 481.84

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Solution

The fourth proportional to 627.60, 939.76 and 481.84 is: 721.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.60 : 939.76 = 481.84 : x
  2. Step 2: Convert to fraction form
    627.60/939.76 = 481.84/x
  3. Step 3: Cross multiply
    627.60x = 939.76 × 481.84
  4. Step 4: Simplify right side
    627.60x = 452,813.96
  5. Step 5: Solve for x
    x = 452,813.96/627.60
  6. Step 6: Final answer
    x = 721.50

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.