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Finding the Fourth Proportional to 636,259.43, 878,054.78 and 349,786.73

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Solution

The fourth proportional to 636,259.43, 878,054.78 and 349,786.73 is: 482,714.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,259.43 : 878,054.78 = 349,786.73 : x
  2. Step 2: Convert to fraction form
    636,259.43/878,054.78 = 349,786.73/x
  3. Step 3: Cross multiply
    636,259.43x = 878,054.78 × 349,786.73
  4. Step 4: Simplify right side
    636,259.43x = 307,131,910,257.07
  5. Step 5: Solve for x
    x = 307,131,910,257.07/636,259.43
  6. Step 6: Final answer
    x = 482,714.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.