Home / 819,962.20-1,230,173.70-399,251.80

Finding the Fourth Proportional to 819,962.20, 1,230,173.70 and 399,251.80

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Solution

The fourth proportional to 819,962.20, 1,230,173.70 and 399,251.80 is: 598,989.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,962.20 : 1,230,173.70 = 399,251.80 : x
  2. Step 2: Convert to fraction form
    819,962.20/1,230,173.70 = 399,251.80/x
  3. Step 3: Cross multiply
    819,962.20x = 1,230,173.70 × 399,251.80
  4. Step 4: Simplify right side
    819,962.20x = 491,149,064,037.66
  5. Step 5: Solve for x
    x = 491,149,064,037.66/819,962.20
  6. Step 6: Final answer
    x = 598,989.89

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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.