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Finding the Fourth Proportional to 321,331.20, 481,996.80 and 259,123.20

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Solution

The fourth proportional to 321,331.20, 481,996.80 and 259,123.20 is: 388,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,331.20 : 481,996.80 = 259,123.20 : x
  2. Step 2: Convert to fraction form
    321,331.20/481,996.80 = 259,123.20/x
  3. Step 3: Cross multiply
    321,331.20x = 481,996.80 × 259,123.20
  4. Step 4: Simplify right side
    321,331.20x = 124,896,553,205.76
  5. Step 5: Solve for x
    x = 124,896,553,205.76/321,331.20
  6. Step 6: Final answer
    x = 388,684.80

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Similar ratio
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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.