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Finding the Fourth Proportional to 280,990.91, 421,375.42 and 112,479.83

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Solution

The fourth proportional to 280,990.91, 421,375.42 and 112,479.83 is: 168,675.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,990.91 : 421,375.42 = 112,479.83 : x
  2. Step 2: Convert to fraction form
    280,990.91/421,375.42 = 112,479.83/x
  3. Step 3: Cross multiply
    280,990.91x = 421,375.42 × 112,479.83
  4. Step 4: Simplify right side
    280,990.91x = 47,396,235,607.78
  5. Step 5: Solve for x
    x = 47,396,235,607.78/280,990.91
  6. Step 6: Final answer
    x = 168,675.33

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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.