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Finding the Fourth Proportional to 618,605.40, 927,680.49 and 213,694.56

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Solution

The fourth proportional to 618,605.40, 927,680.49 and 213,694.56 is: 320,463.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,605.40 : 927,680.49 = 213,694.56 : x
  2. Step 2: Convert to fraction form
    618,605.40/927,680.49 = 213,694.56/x
  3. Step 3: Cross multiply
    618,605.40x = 927,680.49 × 213,694.56
  4. Step 4: Simplify right side
    618,605.40x = 198,240,274,131.13
  5. Step 5: Solve for x
    x = 198,240,274,131.13/618,605.40
  6. Step 6: Final answer
    x = 320,463.21

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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.