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Finding the Fourth Proportional to 664,373.91, 996,910.79 and 290,659.35

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Solution

The fourth proportional to 664,373.91, 996,910.79 and 290,659.35 is: 436,142.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,373.91 : 996,910.79 = 290,659.35 : x
  2. Step 2: Convert to fraction form
    664,373.91/996,910.79 = 290,659.35/x
  3. Step 3: Cross multiply
    664,373.91x = 996,910.79 × 290,659.35
  4. Step 4: Simplify right side
    664,373.91x = 289,761,440,776.09
  5. Step 5: Solve for x
    x = 289,761,440,776.09/664,373.91
  6. Step 6: Final answer
    x = 436,142.11

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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.