Home / 1,280,864.70-1,921,297.05-394,400.70

Finding the Fourth Proportional to 1,280,864.70, 1,921,297.05 and 394,400.70

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Solution

The fourth proportional to 1,280,864.70, 1,921,297.05 and 394,400.70 is: 591,601.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,864.70 : 1,921,297.05 = 394,400.70 : x
  2. Step 2: Convert to fraction form
    1,280,864.70/1,921,297.05 = 394,400.70/x
  3. Step 3: Cross multiply
    1,280,864.70x = 1,921,297.05 × 394,400.70
  4. Step 4: Simplify right side
    1,280,864.70x = 757,760,901,427.94
  5. Step 5: Solve for x
    x = 757,760,901,427.94/1,280,864.70
  6. Step 6: Final answer
    x = 591,601.05

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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.