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Finding the Fourth Proportional to 489,808.90, 733,729.20 and 279,200.80

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Solution

The fourth proportional to 489,808.90, 733,729.20 and 279,200.80 is: 418,240.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,808.90 : 733,729.20 = 279,200.80 : x
  2. Step 2: Convert to fraction form
    489,808.90/733,729.20 = 279,200.80/x
  3. Step 3: Cross multiply
    489,808.90x = 733,729.20 × 279,200.80
  4. Step 4: Simplify right side
    489,808.90x = 204,857,779,623.36
  5. Step 5: Solve for x
    x = 204,857,779,623.36/489,808.90
  6. Step 6: Final answer
    x = 418,240.21

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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.