Home / 820,019.20-1,230,259.20-399,308.80

Finding the Fourth Proportional to 820,019.20, 1,230,259.20 and 399,308.80

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Solution

The fourth proportional to 820,019.20, 1,230,259.20 and 399,308.80 is: 599,075.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,019.20 : 1,230,259.20 = 399,308.80 : x
  2. Step 2: Convert to fraction form
    820,019.20/1,230,259.20 = 399,308.80/x
  3. Step 3: Cross multiply
    820,019.20x = 1,230,259.20 × 399,308.80
  4. Step 4: Simplify right side
    820,019.20x = 491,253,324,840.96
  5. Step 5: Solve for x
    x = 491,253,324,840.96/820,019.20
  6. Step 6: Final answer
    x = 599,075.39

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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.