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Finding the Fourth Proportional to 279,755.97, 386,063.31 and 152,431.58

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Solution

The fourth proportional to 279,755.97, 386,063.31 and 152,431.58 is: 210,355.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,755.97 : 386,063.31 = 152,431.58 : x
  2. Step 2: Convert to fraction form
    279,755.97/386,063.31 = 152,431.58/x
  3. Step 3: Cross multiply
    279,755.97x = 386,063.31 × 152,431.58
  4. Step 4: Simplify right side
    279,755.97x = 58,848,238,393.01
  5. Step 5: Solve for x
    x = 58,848,238,393.01/279,755.97
  6. Step 6: Final answer
    x = 210,355.61

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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.