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Finding the Fourth Proportional to 426,295.91, 639,305.46 and 141,910.08

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Solution

The fourth proportional to 426,295.91, 639,305.46 and 141,910.08 is: 212,819.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,295.91 : 639,305.46 = 141,910.08 : x
  2. Step 2: Convert to fraction form
    426,295.91/639,305.46 = 141,910.08/x
  3. Step 3: Cross multiply
    426,295.91x = 639,305.46 × 141,910.08
  4. Step 4: Simplify right side
    426,295.91x = 90,723,886,575.64
  5. Step 5: Solve for x
    x = 90,723,886,575.64/426,295.91
  6. Step 6: Final answer
    x = 212,819.04

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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.