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Finding the Fourth Proportional to 1,297,789.60, 1,945,906.80 and 667,933.60

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Solution

The fourth proportional to 1,297,789.60, 1,945,906.80 and 667,933.60 is: 1,001,500.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,789.60 : 1,945,906.80 = 667,933.60 : x
  2. Step 2: Convert to fraction form
    1,297,789.60/1,945,906.80 = 667,933.60/x
  3. Step 3: Cross multiply
    1,297,789.60x = 1,945,906.80 × 667,933.60
  4. Step 4: Simplify right side
    1,297,789.60x = 1,299,736,534,188.48
  5. Step 5: Solve for x
    x = 1,299,736,534,188.48/1,297,789.60
  6. Step 6: Final answer
    x = 1,001,500.19

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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.