Home / 420,917.87-580,879.43-229,943.56

Finding the Fourth Proportional to 420,917.87, 580,879.43 and 229,943.56

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Solution

The fourth proportional to 420,917.87, 580,879.43 and 229,943.56 is: 317,329.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,917.87 : 580,879.43 = 229,943.56 : x
  2. Step 2: Convert to fraction form
    420,917.87/580,879.43 = 229,943.56/x
  3. Step 3: Cross multiply
    420,917.87x = 580,879.43 × 229,943.56
  4. Step 4: Simplify right side
    420,917.87x = 133,569,484,064.97
  5. Step 5: Solve for x
    x = 133,569,484,064.97/420,917.87
  6. Step 6: Final answer
    x = 317,329.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.