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Finding the Fourth Proportional to 419,974.60, 629,961.90 and 314,998.60

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Solution

The fourth proportional to 419,974.60, 629,961.90 and 314,998.60 is: 472,497.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,974.60 : 629,961.90 = 314,998.60 : x
  2. Step 2: Convert to fraction form
    419,974.60/629,961.90 = 314,998.60/x
  3. Step 3: Cross multiply
    419,974.60x = 629,961.90 × 314,998.60
  4. Step 4: Simplify right side
    419,974.60x = 198,437,116,553.34
  5. Step 5: Solve for x
    x = 198,437,116,553.34/419,974.60
  6. Step 6: Final answer
    x = 472,497.90

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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.