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Finding the Fourth Proportional to 489,716.80, 734,575.20 and 279,764.80

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Solution

The fourth proportional to 489,716.80, 734,575.20 and 279,764.80 is: 419,647.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,716.80 : 734,575.20 = 279,764.80 : x
  2. Step 2: Convert to fraction form
    489,716.80/734,575.20 = 279,764.80/x
  3. Step 3: Cross multiply
    489,716.80x = 734,575.20 × 279,764.80
  4. Step 4: Simplify right side
    489,716.80x = 205,508,283,912.96
  5. Step 5: Solve for x
    x = 205,508,283,912.96/489,716.80
  6. Step 6: Final answer
    x = 419,647.20

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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.