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Finding the Fourth Proportional to 285,570.37, 394,087.17 and 156,513.97

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Solution

The fourth proportional to 285,570.37, 394,087.17 and 156,513.97 is: 215,989.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,570.37 : 394,087.17 = 156,513.97 : x
  2. Step 2: Convert to fraction form
    285,570.37/394,087.17 = 156,513.97/x
  3. Step 3: Cross multiply
    285,570.37x = 394,087.17 × 156,513.97
  4. Step 4: Simplify right side
    285,570.37x = 61,680,147,502.76
  5. Step 5: Solve for x
    x = 61,680,147,502.76/285,570.37
  6. Step 6: Final answer
    x = 215,989.31

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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.