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Finding the Fourth Proportional to 489,860.60, 675,961.40 and 274,958.69

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Solution

The fourth proportional to 489,860.60, 675,961.40 and 274,958.69 is: 379,417.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,860.60 : 675,961.40 = 274,958.69 : x
  2. Step 2: Convert to fraction form
    489,860.60/675,961.40 = 274,958.69/x
  3. Step 3: Cross multiply
    489,860.60x = 675,961.40 × 274,958.69
  4. Step 4: Simplify right side
    489,860.60x = 185,861,458,342.16
  5. Step 5: Solve for x
    x = 185,861,458,342.16/489,860.60
  6. Step 6: Final answer
    x = 379,417.04

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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.