Home / 858,809.45-1,287,722.10-259,680.80

Finding the Fourth Proportional to 858,809.45, 1,287,722.10 and 259,680.80

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Solution

The fourth proportional to 858,809.45, 1,287,722.10 and 259,680.80 is: 389,372.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,809.45 : 1,287,722.10 = 259,680.80 : x
  2. Step 2: Convert to fraction form
    858,809.45/1,287,722.10 = 259,680.80/x
  3. Step 3: Cross multiply
    858,809.45x = 1,287,722.10 × 259,680.80
  4. Step 4: Simplify right side
    858,809.45x = 334,396,705,105.68
  5. Step 5: Solve for x
    x = 334,396,705,105.68/858,809.45
  6. Step 6: Final answer
    x = 389,372.41

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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.