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Finding the Fourth Proportional to 627.85, 941.10 and 319.78

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Solution

The fourth proportional to 627.85, 941.10 and 319.78 is: 479.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.85 : 941.10 = 319.78 : x
  2. Step 2: Convert to fraction form
    627.85/941.10 = 319.78/x
  3. Step 3: Cross multiply
    627.85x = 941.10 × 319.78
  4. Step 4: Simplify right side
    627.85x = 300,944.96
  5. Step 5: Solve for x
    x = 300,944.96/627.85
  6. Step 6: Final answer
    x = 479.33

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Double scale
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Similar ratio
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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.