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Finding the Fourth Proportional to 512,087.40, 768,131.10 and 344,125.80

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Solution

The fourth proportional to 512,087.40, 768,131.10 and 344,125.80 is: 516,188.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,087.40 : 768,131.10 = 344,125.80 : x
  2. Step 2: Convert to fraction form
    512,087.40/768,131.10 = 344,125.80/x
  3. Step 3: Cross multiply
    512,087.40x = 768,131.10 × 344,125.80
  4. Step 4: Simplify right side
    512,087.40x = 264,333,729,292.38
  5. Step 5: Solve for x
    x = 264,333,729,292.38/512,087.40
  6. Step 6: Final answer
    x = 516,188.70

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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.