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Finding the Fourth Proportional to 285,951.87, 394,660.89 and 158,668.47

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Solution

The fourth proportional to 285,951.87, 394,660.89 and 158,668.47 is: 218,988.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,951.87 : 394,660.89 = 158,668.47 : x
  2. Step 2: Convert to fraction form
    285,951.87/394,660.89 = 158,668.47/x
  3. Step 3: Cross multiply
    285,951.87x = 394,660.89 × 158,668.47
  4. Step 4: Simplify right side
    285,951.87x = 62,620,239,585.14
  5. Step 5: Solve for x
    x = 62,620,239,585.14/285,951.87
  6. Step 6: Final answer
    x = 218,988.74

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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.