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Finding the Fourth Proportional to 285,604.79, 394,138.92 and 156,542.22

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Solution

The fourth proportional to 285,604.79, 394,138.92 and 156,542.22 is: 216,030.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,604.79 : 394,138.92 = 156,542.22 : x
  2. Step 2: Convert to fraction form
    285,604.79/394,138.92 = 156,542.22/x
  3. Step 3: Cross multiply
    285,604.79x = 394,138.92 × 156,542.22
  4. Step 4: Simplify right side
    285,604.79x = 61,699,381,525.20
  5. Step 5: Solve for x
    x = 61,699,381,525.20/285,604.79
  6. Step 6: Final answer
    x = 216,030.63

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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.