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Finding the Fourth Proportional to 279,910.53, 419,853.03 and 90,379.65

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Solution

The fourth proportional to 279,910.53, 419,853.03 and 90,379.65 is: 135,565.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,910.53 : 419,853.03 = 90,379.65 : x
  2. Step 2: Convert to fraction form
    279,910.53/419,853.03 = 90,379.65/x
  3. Step 3: Cross multiply
    279,910.53x = 419,853.03 × 90,379.65
  4. Step 4: Simplify right side
    279,910.53x = 37,946,169,902.84
  5. Step 5: Solve for x
    x = 37,946,169,902.84/279,910.53
  6. Step 6: Final answer
    x = 135,565.35

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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.