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Finding the Fourth Proportional to 259,728.80, 389,593.20 and 119,760.80

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Solution

The fourth proportional to 259,728.80, 389,593.20 and 119,760.80 is: 179,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,728.80 : 389,593.20 = 119,760.80 : x
  2. Step 2: Convert to fraction form
    259,728.80/389,593.20 = 119,760.80/x
  3. Step 3: Cross multiply
    259,728.80x = 389,593.20 × 119,760.80
  4. Step 4: Simplify right side
    259,728.80x = 46,657,993,306.56
  5. Step 5: Solve for x
    x = 46,657,993,306.56/259,728.80
  6. Step 6: Final answer
    x = 179,641.20

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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.