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Finding the Fourth Proportional to 658,486.82, 987,708 and 279,163.64

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Solution

The fourth proportional to 658,486.82, 987,708 and 279,163.64 is: 418,736.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,486.82 : 987,708 = 279,163.64 : x
  2. Step 2: Convert to fraction form
    658,486.82/987,708 = 279,163.64/x
  3. Step 3: Cross multiply
    658,486.82x = 987,708 × 279,163.64
  4. Step 4: Simplify right side
    658,486.82x = 275,732,160,537.12
  5. Step 5: Solve for x
    x = 275,732,160,537.12/658,486.82
  6. Step 6: Final answer
    x = 418,736.04

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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.