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Finding the Fourth Proportional to 489,399.82, 675,402.78 and 274,553.80

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Solution

The fourth proportional to 489,399.82, 675,402.78 and 274,553.80 is: 378,901.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,399.82 : 675,402.78 = 274,553.80 : x
  2. Step 2: Convert to fraction form
    489,399.82/675,402.78 = 274,553.80/x
  3. Step 3: Cross multiply
    489,399.82x = 675,402.78 × 274,553.80
  4. Step 4: Simplify right side
    489,399.82x = 185,434,399,779.56
  5. Step 5: Solve for x
    x = 185,434,399,779.56/489,399.82
  6. Step 6: Final answer
    x = 378,901.65

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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.