Home / 820,432.80-1,230,641.10-259,467.30

Finding the Fourth Proportional to 820,432.80, 1,230,641.10 and 259,467.30

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Solution

The fourth proportional to 820,432.80, 1,230,641.10 and 259,467.30 is: 389,198.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,432.80 : 1,230,641.10 = 259,467.30 : x
  2. Step 2: Convert to fraction form
    820,432.80/1,230,641.10 = 259,467.30/x
  3. Step 3: Cross multiply
    820,432.80x = 1,230,641.10 × 259,467.30
  4. Step 4: Simplify right side
    820,432.80x = 319,311,123,486.03
  5. Step 5: Solve for x
    x = 319,311,123,486.03/820,432.80
  6. Step 6: Final answer
    x = 389,198.39

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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.