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Finding the Fourth Proportional to 285,890.72, 394,519.14 and 158,578.16

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Solution

The fourth proportional to 285,890.72, 394,519.14 and 158,578.16 is: 218,832.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,890.72 : 394,519.14 = 158,578.16 : x
  2. Step 2: Convert to fraction form
    285,890.72/394,519.14 = 158,578.16/x
  3. Step 3: Cross multiply
    285,890.72x = 394,519.14 × 158,578.16
  4. Step 4: Simplify right side
    285,890.72x = 62,562,119,305.98
  5. Step 5: Solve for x
    x = 62,562,119,305.98/285,890.72
  6. Step 6: Final answer
    x = 218,832.28

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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.