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Finding the Fourth Proportional to 321,318.80, 481,978.20 and 203,220.80

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Solution

The fourth proportional to 321,318.80, 481,978.20 and 203,220.80 is: 304,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,318.80 : 481,978.20 = 203,220.80 : x
  2. Step 2: Convert to fraction form
    321,318.80/481,978.20 = 203,220.80/x
  3. Step 3: Cross multiply
    321,318.80x = 481,978.20 × 203,220.80
  4. Step 4: Simplify right side
    321,318.80x = 97,947,995,386.56
  5. Step 5: Solve for x
    x = 97,947,995,386.56/321,318.80
  6. Step 6: Final answer
    x = 304,831.20

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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.