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Finding the Fourth Proportional to 489,859.12, 675,999.63 and 274,993.66

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Solution

The fourth proportional to 489,859.12, 675,999.63 and 274,993.66 is: 379,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,859.12 : 675,999.63 = 274,993.66 : x
  2. Step 2: Convert to fraction form
    489,859.12/675,999.63 = 274,993.66/x
  3. Step 3: Cross multiply
    489,859.12x = 675,999.63 × 274,993.66
  4. Step 4: Simplify right side
    489,859.12x = 185,895,612,412.35
  5. Step 5: Solve for x
    x = 185,895,612,412.35/489,859.12
  6. Step 6: Final answer
    x = 379,487.91

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1.5x scale

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.