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Finding the Fourth Proportional to 279,422.78, 419,134.31 and 92,434.28

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Solution

The fourth proportional to 279,422.78, 419,134.31 and 92,434.28 is: 138,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,422.78 : 419,134.31 = 92,434.28 : x
  2. Step 2: Convert to fraction form
    279,422.78/419,134.31 = 92,434.28/x
  3. Step 3: Cross multiply
    279,422.78x = 419,134.31 × 92,434.28
  4. Step 4: Simplify right side
    279,422.78x = 38,742,377,705.98
  5. Step 5: Solve for x
    x = 38,742,377,705.98/279,422.78
  6. Step 6: Final answer
    x = 138,651.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.