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Finding the Fourth Proportional to 489,868.56, 675,996.84 and 275,004.72

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Solution

The fourth proportional to 489,868.56, 675,996.84 and 275,004.72 is: 379,494.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,868.56 : 675,996.84 = 275,004.72 : x
  2. Step 2: Convert to fraction form
    489,868.56/675,996.84 = 275,004.72/x
  3. Step 3: Cross multiply
    489,868.56x = 675,996.84 × 275,004.72
  4. Step 4: Simplify right side
    489,868.56x = 185,902,321,705.09
  5. Step 5: Solve for x
    x = 185,902,321,705.09/489,868.56
  6. Step 6: Final answer
    x = 379,494.29

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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.