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Finding the Fourth Proportional to 618,013.98, 927,436.50 and 218,653.20

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Solution

The fourth proportional to 618,013.98, 927,436.50 and 218,653.20 is: 328,126.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,013.98 : 927,436.50 = 218,653.20 : x
  2. Step 2: Convert to fraction form
    618,013.98/927,436.50 = 218,653.20/x
  3. Step 3: Cross multiply
    618,013.98x = 927,436.50 × 218,653.20
  4. Step 4: Simplify right side
    618,013.98x = 202,786,958,521.80
  5. Step 5: Solve for x
    x = 202,786,958,521.80/618,013.98
  6. Step 6: Final answer
    x = 328,126.81

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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.