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Finding the Fourth Proportional to 279,912.58, 386,265.39 and 159,037.90

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Solution

The fourth proportional to 279,912.58, 386,265.39 and 159,037.90 is: 219,464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,912.58 : 386,265.39 = 159,037.90 : x
  2. Step 2: Convert to fraction form
    279,912.58/386,265.39 = 159,037.90/x
  3. Step 3: Cross multiply
    279,912.58x = 386,265.39 × 159,037.90
  4. Step 4: Simplify right side
    279,912.58x = 61,430,836,468.28
  5. Step 5: Solve for x
    x = 61,430,836,468.28/279,912.58
  6. Step 6: Final answer
    x = 219,464.36

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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.