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Finding the Fourth Proportional to 605,879.40, 908,915.10 and 206,557.80

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Solution

The fourth proportional to 605,879.40, 908,915.10 and 206,557.80 is: 309,869.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,879.40 : 908,915.10 = 206,557.80 : x
  2. Step 2: Convert to fraction form
    605,879.40/908,915.10 = 206,557.80/x
  3. Step 3: Cross multiply
    605,879.40x = 908,915.10 × 206,557.80
  4. Step 4: Simplify right side
    605,879.40x = 187,743,503,442.78
  5. Step 5: Solve for x
    x = 187,743,503,442.78/605,879.40
  6. Step 6: Final answer
    x = 309,869.43

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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.