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Finding the Fourth Proportional to 658,217.46, 987,683.40 and 279,351.30

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Solution

The fourth proportional to 658,217.46, 987,683.40 and 279,351.30 is: 419,178.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,217.46 : 987,683.40 = 279,351.30 : x
  2. Step 2: Convert to fraction form
    658,217.46/987,683.40 = 279,351.30/x
  3. Step 3: Cross multiply
    658,217.46x = 987,683.40 × 279,351.30
  4. Step 4: Simplify right side
    658,217.46x = 275,910,641,778.42
  5. Step 5: Solve for x
    x = 275,910,641,778.42/658,217.46
  6. Step 6: Final answer
    x = 419,178.55

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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.