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Finding the Fourth Proportional to 658,308.87, 987,497.33 and 209,065.05

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Solution

The fourth proportional to 658,308.87, 987,497.33 and 209,065.05 is: 313,608.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,308.87 : 987,497.33 = 209,065.05 : x
  2. Step 2: Convert to fraction form
    658,308.87/987,497.33 = 209,065.05/x
  3. Step 3: Cross multiply
    658,308.87x = 987,497.33 × 209,065.05
  4. Step 4: Simplify right side
    658,308.87x = 206,451,177,625.99
  5. Step 5: Solve for x
    x = 206,451,177,625.99/658,308.87
  6. Step 6: Final answer
    x = 313,608.38

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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.