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Finding the Fourth Proportional to 285,606, 394,136.28 and 158,289.80

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Solution

The fourth proportional to 285,606, 394,136.28 and 158,289.80 is: 218,439.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,606 : 394,136.28 = 158,289.80 : x
  2. Step 2: Convert to fraction form
    285,606/394,136.28 = 158,289.80/x
  3. Step 3: Cross multiply
    285,606x = 394,136.28 × 158,289.80
  4. Step 4: Simplify right side
    285,606x = 62,387,750,963.26
  5. Step 5: Solve for x
    x = 62,387,750,963.26/285,606
  6. Step 6: Final answer
    x = 218,439.92

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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.