Home / 768,108.62-1,059,989.24-428,576.87

Finding the Fourth Proportional to 768,108.62, 1,059,989.24 and 428,576.87

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Solution

The fourth proportional to 768,108.62, 1,059,989.24 and 428,576.87 is: 591,435.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,108.62 : 1,059,989.24 = 428,576.87 : x
  2. Step 2: Convert to fraction form
    768,108.62/1,059,989.24 = 428,576.87/x
  3. Step 3: Cross multiply
    768,108.62x = 1,059,989.24 × 428,576.87
  4. Step 4: Simplify right side
    768,108.62x = 454,286,872,023.55
  5. Step 5: Solve for x
    x = 454,286,872,023.55/768,108.62
  6. Step 6: Final answer
    x = 591,435.71

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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.