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Finding the Fourth Proportional to 323,175.40, 484,787.40 and 86,512.84

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Solution

The fourth proportional to 323,175.40, 484,787.40 and 86,512.84 is: 129,775.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,175.40 : 484,787.40 = 86,512.84 : x
  2. Step 2: Convert to fraction form
    323,175.40/484,787.40 = 86,512.84/x
  3. Step 3: Cross multiply
    323,175.40x = 484,787.40 × 86,512.84
  4. Step 4: Simplify right side
    323,175.40x = 41,940,334,770.22
  5. Step 5: Solve for x
    x = 41,940,334,770.22/323,175.40
  6. Step 6: Final answer
    x = 129,775.77

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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.