Home / 439,629.20-659,443.80-387,141.20

Finding the Fourth Proportional to 439,629.20, 659,443.80 and 387,141.20

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Solution

The fourth proportional to 439,629.20, 659,443.80 and 387,141.20 is: 580,711.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,629.20 : 659,443.80 = 387,141.20 : x
  2. Step 2: Convert to fraction form
    439,629.20/659,443.80 = 387,141.20/x
  3. Step 3: Cross multiply
    439,629.20x = 659,443.80 × 387,141.20
  4. Step 4: Simplify right side
    439,629.20x = 255,297,864,064.56
  5. Step 5: Solve for x
    x = 255,297,864,064.56/439,629.20
  6. Step 6: Final answer
    x = 580,711.80

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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.