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Finding the Fourth Proportional to 285,634.05, 394,179.90 and 156,563.91

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Solution

The fourth proportional to 285,634.05, 394,179.90 and 156,563.91 is: 216,060.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,634.05 : 394,179.90 = 156,563.91 : x
  2. Step 2: Convert to fraction form
    285,634.05/394,179.90 = 156,563.91/x
  3. Step 3: Cross multiply
    285,634.05x = 394,179.90 × 156,563.91
  4. Step 4: Simplify right side
    285,634.05x = 61,714,346,387.41
  5. Step 5: Solve for x
    x = 61,714,346,387.41/285,634.05
  6. Step 6: Final answer
    x = 216,060.89

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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.