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Finding the Fourth Proportional to 489,398.82, 675,401.40 and 274,552.80

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Solution

The fourth proportional to 489,398.82, 675,401.40 and 274,552.80 is: 378,900.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,398.82 : 675,401.40 = 274,552.80 : x
  2. Step 2: Convert to fraction form
    489,398.82/675,401.40 = 274,552.80/x
  3. Step 3: Cross multiply
    489,398.82x = 675,401.40 × 274,552.80
  4. Step 4: Simplify right side
    489,398.82x = 185,433,345,493.92
  5. Step 5: Solve for x
    x = 185,433,345,493.92/489,398.82
  6. Step 6: Final answer
    x = 378,900.27

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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.