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Finding the Fourth Proportional to 453,419.80, 680,388.90 and 173,138.20

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Solution

The fourth proportional to 453,419.80, 680,388.90 and 173,138.20 is: 259,806.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,419.80 : 680,388.90 = 173,138.20 : x
  2. Step 2: Convert to fraction form
    453,419.80/680,388.90 = 173,138.20/x
  3. Step 3: Cross multiply
    453,419.80x = 680,388.90 × 173,138.20
  4. Step 4: Simplify right side
    453,419.80x = 117,801,309,445.98
  5. Step 5: Solve for x
    x = 117,801,309,445.98/453,419.80
  6. Step 6: Final answer
    x = 259,806.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.