Home / 643,456.20-887,969.97-356,976.57

Finding the Fourth Proportional to 643,456.20, 887,969.97 and 356,976.57

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Solution

The fourth proportional to 643,456.20, 887,969.97 and 356,976.57 is: 492,627.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,456.20 : 887,969.97 = 356,976.57 : x
  2. Step 2: Convert to fraction form
    643,456.20/887,969.97 = 356,976.57/x
  3. Step 3: Cross multiply
    643,456.20x = 887,969.97 × 356,976.57
  4. Step 4: Simplify right side
    643,456.20x = 316,984,474,153.60
  5. Step 5: Solve for x
    x = 316,984,474,153.60/643,456.20
  6. Step 6: Final answer
    x = 492,627.90

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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.