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Finding the Fourth Proportional to 489,908.76, 676,056.74 and 275,057.88

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Solution

The fourth proportional to 489,908.76, 676,056.74 and 275,057.88 is: 379,570.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,908.76 : 676,056.74 = 275,057.88 : x
  2. Step 2: Convert to fraction form
    489,908.76/676,056.74 = 275,057.88/x
  3. Step 3: Cross multiply
    489,908.76x = 676,056.74 × 275,057.88
  4. Step 4: Simplify right side
    489,908.76x = 185,954,729,753.61
  5. Step 5: Solve for x
    x = 185,954,729,753.61/489,908.76
  6. Step 6: Final answer
    x = 379,570.13

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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.