Home / 485,917.53-729,086.79-261,015.54

Finding the Fourth Proportional to 485,917.53, 729,086.79 and 261,015.54

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Solution

The fourth proportional to 485,917.53, 729,086.79 and 261,015.54 is: 391,636.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,917.53 : 729,086.79 = 261,015.54 : x
  2. Step 2: Convert to fraction form
    485,917.53/729,086.79 = 261,015.54/x
  3. Step 3: Cross multiply
    485,917.53x = 729,086.79 × 261,015.54
  4. Step 4: Simplify right side
    485,917.53x = 190,302,982,198.72
  5. Step 5: Solve for x
    x = 190,302,982,198.72/485,917.53
  6. Step 6: Final answer
    x = 391,636.38

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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.