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Finding the Fourth Proportional to 389,983.92, 538,187.64 and 239,164.08

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Solution

The fourth proportional to 389,983.92, 538,187.64 and 239,164.08 is: 330,052.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,983.92 : 538,187.64 = 239,164.08 : x
  2. Step 2: Convert to fraction form
    389,983.92/538,187.64 = 239,164.08/x
  3. Step 3: Cross multiply
    389,983.92x = 538,187.64 × 239,164.08
  4. Step 4: Simplify right side
    389,983.92x = 128,715,151,787.97
  5. Step 5: Solve for x
    x = 128,715,151,787.97/389,983.92
  6. Step 6: Final answer
    x = 330,052.46

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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.