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Finding the Fourth Proportional to 279,901.31, 386,262.86 and 159,036.75

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Solution

The fourth proportional to 279,901.31, 386,262.86 and 159,036.75 is: 219,470.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,901.31 : 386,262.86 = 159,036.75 : x
  2. Step 2: Convert to fraction form
    279,901.31/386,262.86 = 159,036.75/x
  3. Step 3: Cross multiply
    279,901.31x = 386,262.86 × 159,036.75
  4. Step 4: Simplify right side
    279,901.31x = 61,429,989,104.92
  5. Step 5: Solve for x
    x = 61,429,989,104.92/279,901.31
  6. Step 6: Final answer
    x = 219,470.18

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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.