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Finding the Fourth Proportional to 489,885.84, 676,020.78 and 275,021.64

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Solution

The fourth proportional to 489,885.84, 676,020.78 and 275,021.64 is: 379,517.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,885.84 : 676,020.78 = 275,021.64 : x
  2. Step 2: Convert to fraction form
    489,885.84/676,020.78 = 275,021.64/x
  3. Step 3: Cross multiply
    489,885.84x = 676,020.78 × 275,021.64
  4. Step 4: Simplify right side
    489,885.84x = 185,920,343,589.68
  5. Step 5: Solve for x
    x = 185,920,343,589.68/489,885.84
  6. Step 6: Final answer
    x = 379,517.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.