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Finding the Fourth Proportional to 285,940.40, 394,591.56 and 158,613.20

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Solution

The fourth proportional to 285,940.40, 394,591.56 and 158,613.20 is: 218,882.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,940.40 : 394,591.56 = 158,613.20 : x
  2. Step 2: Convert to fraction form
    285,940.40/394,591.56 = 158,613.20/x
  3. Step 3: Cross multiply
    285,940.40x = 394,591.56 × 158,613.20
  4. Step 4: Simplify right side
    285,940.40x = 62,587,430,024.59
  5. Step 5: Solve for x
    x = 62,587,430,024.59/285,940.40
  6. Step 6: Final answer
    x = 218,882.78

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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.