Home / 840,375.45-1,260,563.21-307,680.57

Finding the Fourth Proportional to 840,375.45, 1,260,563.21 and 307,680.57

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Solution

The fourth proportional to 840,375.45, 1,260,563.21 and 307,680.57 is: 461,520.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,375.45 : 1,260,563.21 = 307,680.57 : x
  2. Step 2: Convert to fraction form
    840,375.45/1,260,563.21 = 307,680.57/x
  3. Step 3: Cross multiply
    840,375.45x = 1,260,563.21 × 307,680.57
  4. Step 4: Simplify right side
    840,375.45x = 387,850,805,435.43
  5. Step 5: Solve for x
    x = 387,850,805,435.43/840,375.45
  6. Step 6: Final answer
    x = 461,520.87

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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.