Home / 389,930.10-538,107.26-228,787.90

Finding the Fourth Proportional to 389,930.10, 538,107.26 and 228,787.90

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Solution

The fourth proportional to 389,930.10, 538,107.26 and 228,787.90 is: 315,729.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,930.10 : 538,107.26 = 228,787.90 : x
  2. Step 2: Convert to fraction form
    389,930.10/538,107.26 = 228,787.90/x
  3. Step 3: Cross multiply
    389,930.10x = 538,107.26 × 228,787.90
  4. Step 4: Simplify right side
    389,930.10x = 123,112,429,990.15
  5. Step 5: Solve for x
    x = 123,112,429,990.15/389,930.10
  6. Step 6: Final answer
    x = 315,729.49

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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.