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Finding the Fourth Proportional to 643,084.80, 964,972.80 and 269,145.60

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Solution

The fourth proportional to 643,084.80, 964,972.80 and 269,145.60 is: 403,863.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,084.80 : 964,972.80 = 269,145.60 : x
  2. Step 2: Convert to fraction form
    643,084.80/964,972.80 = 269,145.60/x
  3. Step 3: Cross multiply
    643,084.80x = 964,972.80 × 269,145.60
  4. Step 4: Simplify right side
    643,084.80x = 259,718,183,239.68
  5. Step 5: Solve for x
    x = 259,718,183,239.68/643,084.80
  6. Step 6: Final answer
    x = 403,863.04

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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.