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Finding the Fourth Proportional to 412,906.60, 619,359.90 and 307,930.60

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Solution

The fourth proportional to 412,906.60, 619,359.90 and 307,930.60 is: 461,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,906.60 : 619,359.90 = 307,930.60 : x
  2. Step 2: Convert to fraction form
    412,906.60/619,359.90 = 307,930.60/x
  3. Step 3: Cross multiply
    412,906.60x = 619,359.90 × 307,930.60
  4. Step 4: Simplify right side
    412,906.60x = 190,719,865,622.94
  5. Step 5: Solve for x
    x = 190,719,865,622.94/412,906.60
  6. Step 6: Final answer
    x = 461,895.90

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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.