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Finding the Fourth Proportional to 319,620.35, 479,305.83 and 119,831.69

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Solution

The fourth proportional to 319,620.35, 479,305.83 and 119,831.69 is: 179,700.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,620.35 : 479,305.83 = 119,831.69 : x
  2. Step 2: Convert to fraction form
    319,620.35/479,305.83 = 119,831.69/x
  3. Step 3: Cross multiply
    319,620.35x = 479,305.83 × 119,831.69
  4. Step 4: Simplify right side
    319,620.35x = 57,436,027,635.75
  5. Step 5: Solve for x
    x = 57,436,027,635.75/319,620.35
  6. Step 6: Final answer
    x = 179,700.78

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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.