Home / 820,032.20-1,230,278.70-399,321.80

Finding the Fourth Proportional to 820,032.20, 1,230,278.70 and 399,321.80

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Solution

The fourth proportional to 820,032.20, 1,230,278.70 and 399,321.80 is: 599,094.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,032.20 : 1,230,278.70 = 399,321.80 : x
  2. Step 2: Convert to fraction form
    820,032.20/1,230,278.70 = 399,321.80/x
  3. Step 3: Cross multiply
    820,032.20x = 1,230,278.70 × 399,321.80
  4. Step 4: Simplify right side
    820,032.20x = 491,277,104,985.66
  5. Step 5: Solve for x
    x = 491,277,104,985.66/820,032.20
  6. Step 6: Final answer
    x = 599,094.90

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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.