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Finding the Fourth Proportional to 451,375.49, 678,121.15 and 425,840.85

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Solution

The fourth proportional to 451,375.49, 678,121.15 and 425,840.85 is: 639,759.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,375.49 : 678,121.15 = 425,840.85 : x
  2. Step 2: Convert to fraction form
    451,375.49/678,121.15 = 425,840.85/x
  3. Step 3: Cross multiply
    451,375.49x = 678,121.15 × 425,840.85
  4. Step 4: Simplify right side
    451,375.49x = 288,771,686,918.98
  5. Step 5: Solve for x
    x = 288,771,686,918.98/451,375.49
  6. Step 6: Final answer
    x = 639,759.34

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1.5x scale

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.