Home / 420,705.74-580,571.61-229,717.78

Finding the Fourth Proportional to 420,705.74, 580,571.61 and 229,717.78

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Solution

The fourth proportional to 420,705.74, 580,571.61 and 229,717.78 is: 317,009.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,705.74 : 580,571.61 = 229,717.78 : x
  2. Step 2: Convert to fraction form
    420,705.74/580,571.61 = 229,717.78/x
  3. Step 3: Cross multiply
    420,705.74x = 580,571.61 × 229,717.78
  4. Step 4: Simplify right side
    420,705.74x = 133,367,621,380.23
  5. Step 5: Solve for x
    x = 133,367,621,380.23/420,705.74
  6. Step 6: Final answer
    x = 317,009.27

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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.