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Finding the Fourth Proportional to 490,018.95, 676,179.09 and 275,109.75

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Solution

The fourth proportional to 490,018.95, 676,179.09 and 275,109.75 is: 379,625.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,018.95 : 676,179.09 = 275,109.75 : x
  2. Step 2: Convert to fraction form
    490,018.95/676,179.09 = 275,109.75/x
  3. Step 3: Cross multiply
    490,018.95x = 676,179.09 × 275,109.75
  4. Step 4: Simplify right side
    490,018.95x = 186,023,460,405.13
  5. Step 5: Solve for x
    x = 186,023,460,405.13/490,018.95
  6. Step 6: Final answer
    x = 379,625.03

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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.