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Finding the Fourth Proportional to 489,858.12, 675,998.25 and 274,992.66

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Solution

The fourth proportional to 489,858.12, 675,998.25 and 274,992.66 is: 379,486.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,858.12 : 675,998.25 = 274,992.66 : x
  2. Step 2: Convert to fraction form
    489,858.12/675,998.25 = 274,992.66/x
  3. Step 3: Cross multiply
    489,858.12x = 675,998.25 × 274,992.66
  4. Step 4: Simplify right side
    489,858.12x = 185,894,556,922.85
  5. Step 5: Solve for x
    x = 185,894,556,922.85/489,858.12
  6. Step 6: Final answer
    x = 379,486.53

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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.