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Finding the Fourth Proportional to 489,871.67, 676,022.39 and 275,012.15

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Solution

The fourth proportional to 489,871.67, 676,022.39 and 275,012.15 is: 379,516.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,871.67 : 676,022.39 = 275,012.15 : x
  2. Step 2: Convert to fraction form
    489,871.67/676,022.39 = 275,012.15/x
  3. Step 3: Cross multiply
    489,871.67x = 676,022.39 × 275,012.15
  4. Step 4: Simplify right side
    489,871.67x = 185,914,367,198.16
  5. Step 5: Solve for x
    x = 185,914,367,198.16/489,871.67
  6. Step 6: Final answer
    x = 379,516.47

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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.