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Finding the Fourth Proportional to 263,281.63, 394,963.43 and 85,747.34

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Solution

The fourth proportional to 263,281.63, 394,963.43 and 85,747.34 is: 128,634.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,281.63 : 394,963.43 = 85,747.34 : x
  2. Step 2: Convert to fraction form
    263,281.63/394,963.43 = 85,747.34/x
  3. Step 3: Cross multiply
    263,281.63x = 394,963.43 × 85,747.34
  4. Step 4: Simplify right side
    263,281.63x = 33,867,061,116.22
  5. Step 5: Solve for x
    x = 33,867,061,116.22/263,281.63
  6. Step 6: Final answer
    x = 128,634.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.