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Finding the Fourth Proportional to 239,712.40, 330,724.38 and 154,879.48

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Solution

The fourth proportional to 239,712.40, 330,724.38 and 154,879.48 is: 213,682.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,712.40 : 330,724.38 = 154,879.48 : x
  2. Step 2: Convert to fraction form
    239,712.40/330,724.38 = 154,879.48/x
  3. Step 3: Cross multiply
    239,712.40x = 330,724.38 × 154,879.48
  4. Step 4: Simplify right side
    239,712.40x = 51,222,419,997.72
  5. Step 5: Solve for x
    x = 51,222,419,997.72/239,712.40
  6. Step 6: Final answer
    x = 213,682.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.