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Finding the Fourth Proportional to 321,268.80, 481,903.20 and 155,380.80

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Solution

The fourth proportional to 321,268.80, 481,903.20 and 155,380.80 is: 233,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,268.80 : 481,903.20 = 155,380.80 : x
  2. Step 2: Convert to fraction form
    321,268.80/481,903.20 = 155,380.80/x
  3. Step 3: Cross multiply
    321,268.80x = 481,903.20 × 155,380.80
  4. Step 4: Simplify right side
    321,268.80x = 74,878,504,738.56
  5. Step 5: Solve for x
    x = 74,878,504,738.56/321,268.80
  6. Step 6: Final answer
    x = 233,071.20

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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.