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Finding the Fourth Proportional to 262,787.76, 394,244.40 and 85,295.28

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Solution

The fourth proportional to 262,787.76, 394,244.40 and 85,295.28 is: 127,963.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,787.76 : 394,244.40 = 85,295.28 : x
  2. Step 2: Convert to fraction form
    262,787.76/394,244.40 = 85,295.28/x
  3. Step 3: Cross multiply
    262,787.76x = 394,244.40 × 85,295.28
  4. Step 4: Simplify right side
    262,787.76x = 33,627,186,486.43
  5. Step 5: Solve for x
    x = 33,627,186,486.43/262,787.76
  6. Step 6: Final answer
    x = 127,963.29

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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.