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Finding the Fourth Proportional to 490,015.20, 676,173.92 and 275,106

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Solution

The fourth proportional to 490,015.20, 676,173.92 and 275,106 is: 379,619.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,015.20 : 676,173.92 = 275,106 : x
  2. Step 2: Convert to fraction form
    490,015.20/676,173.92 = 275,106/x
  3. Step 3: Cross multiply
    490,015.20x = 676,173.92 × 275,106
  4. Step 4: Simplify right side
    490,015.20x = 186,019,501,059.99
  5. Step 5: Solve for x
    x = 186,019,501,059.99/490,015.20
  6. Step 6: Final answer
    x = 379,619.86

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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.