Home / 820,405.60-1,230,493.20-259,496.80

Finding the Fourth Proportional to 820,405.60, 1,230,493.20 and 259,496.80

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Solution

The fourth proportional to 820,405.60, 1,230,493.20 and 259,496.80 is: 389,208.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,405.60 : 1,230,493.20 = 259,496.80 : x
  2. Step 2: Convert to fraction form
    820,405.60/1,230,493.20 = 259,496.80/x
  3. Step 3: Cross multiply
    820,405.60x = 1,230,493.20 × 259,496.80
  4. Step 4: Simplify right side
    820,405.60x = 319,309,047,821.76
  5. Step 5: Solve for x
    x = 319,309,047,821.76/820,405.60
  6. Step 6: Final answer
    x = 389,208.76

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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.