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Finding the Fourth Proportional to 658,381.97, 987,600.40 and 321,020.82

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Solution

The fourth proportional to 658,381.97, 987,600.40 and 321,020.82 is: 481,544.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,381.97 : 987,600.40 = 321,020.82 : x
  2. Step 2: Convert to fraction form
    658,381.97/987,600.40 = 321,020.82/x
  3. Step 3: Cross multiply
    658,381.97x = 987,600.40 × 321,020.82
  4. Step 4: Simplify right side
    658,381.97x = 317,040,289,437.78
  5. Step 5: Solve for x
    x = 317,040,289,437.78/658,381.97
  6. Step 6: Final answer
    x = 481,544.61

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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.