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Finding the Fourth Proportional to 465,734.80, 642,687.78 and 274,809.70

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Solution

The fourth proportional to 465,734.80, 642,687.78 and 274,809.70 is: 379,221.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,734.80 : 642,687.78 = 274,809.70 : x
  2. Step 2: Convert to fraction form
    465,734.80/642,687.78 = 274,809.70/x
  3. Step 3: Cross multiply
    465,734.80x = 642,687.78 × 274,809.70
  4. Step 4: Simplify right side
    465,734.80x = 176,616,836,015.47
  5. Step 5: Solve for x
    x = 176,616,836,015.47/465,734.80
  6. Step 6: Final answer
    x = 379,221.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.