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Finding the Fourth Proportional to 279,868.98, 386,229.63 and 159,030.78

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Solution

The fourth proportional to 279,868.98, 386,229.63 and 159,030.78 is: 219,468.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,868.98 : 386,229.63 = 159,030.78 : x
  2. Step 2: Convert to fraction form
    279,868.98/386,229.63 = 159,030.78/x
  3. Step 3: Cross multiply
    279,868.98x = 386,229.63 × 159,030.78
  4. Step 4: Simplify right side
    279,868.98x = 61,422,399,318.01
  5. Step 5: Solve for x
    x = 61,422,399,318.01/279,868.98
  6. Step 6: Final answer
    x = 219,468.41

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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.