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Finding the Fourth Proportional to 643,679.80, 965,865.30 and 269,740.60

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Solution

The fourth proportional to 643,679.80, 965,865.30 and 269,740.60 is: 404,755.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,679.80 : 965,865.30 = 269,740.60 : x
  2. Step 2: Convert to fraction form
    643,679.80/965,865.30 = 269,740.60/x
  3. Step 3: Cross multiply
    643,679.80x = 965,865.30 × 269,740.60
  4. Step 4: Simplify right side
    643,679.80x = 260,533,085,541.18
  5. Step 5: Solve for x
    x = 260,533,085,541.18/643,679.80
  6. Step 6: Final answer
    x = 404,755.73

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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.