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Finding the Fourth Proportional to 490,209.22, 676,489.08 and 275,349.40

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Solution

The fourth proportional to 490,209.22, 676,489.08 and 275,349.40 is: 379,982.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,209.22 : 676,489.08 = 275,349.40 : x
  2. Step 2: Convert to fraction form
    490,209.22/676,489.08 = 275,349.40/x
  3. Step 3: Cross multiply
    490,209.22x = 676,489.08 × 275,349.40
  4. Step 4: Simplify right side
    490,209.22x = 186,270,862,284.55
  5. Step 5: Solve for x
    x = 186,270,862,284.55/490,209.22
  6. Step 6: Final answer
    x = 379,982.37

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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.