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Finding the Fourth Proportional to 490,221.22, 676,505.64 and 275,361.40

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Solution

The fourth proportional to 490,221.22, 676,505.64 and 275,361.40 is: 379,998.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,221.22 : 676,505.64 = 275,361.40 : x
  2. Step 2: Convert to fraction form
    490,221.22/676,505.64 = 275,361.40/x
  3. Step 3: Cross multiply
    490,221.22x = 676,505.64 × 275,361.40
  4. Step 4: Simplify right side
    490,221.22x = 186,283,540,138.30
  5. Step 5: Solve for x
    x = 186,283,540,138.30/490,221.22
  6. Step 6: Final answer
    x = 379,998.93

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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.