Home / 420,780.27-580,678.89-229,793.65

Finding the Fourth Proportional to 420,780.27, 580,678.89 and 229,793.65

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Solution

The fourth proportional to 420,780.27, 580,678.89 and 229,793.65 is: 317,116.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,780.27 : 580,678.89 = 229,793.65 : x
  2. Step 2: Convert to fraction form
    420,780.27/580,678.89 = 229,793.65/x
  3. Step 3: Cross multiply
    420,780.27x = 580,678.89 × 229,793.65
  4. Step 4: Simplify right side
    420,780.27x = 133,436,321,611.05
  5. Step 5: Solve for x
    x = 133,436,321,611.05/420,780.27
  6. Step 6: Final answer
    x = 317,116.39

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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.