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Finding the Fourth Proportional to 417,694.20, 626,622.10 and 168,401.40

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Solution

The fourth proportional to 417,694.20, 626,622.10 and 168,401.40 is: 252,634.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,694.20 : 626,622.10 = 168,401.40 : x
  2. Step 2: Convert to fraction form
    417,694.20/626,622.10 = 168,401.40/x
  3. Step 3: Cross multiply
    417,694.20x = 626,622.10 × 168,401.40
  4. Step 4: Simplify right side
    417,694.20x = 105,524,038,910.94
  5. Step 5: Solve for x
    x = 105,524,038,910.94/417,694.20
  6. Step 6: Final answer
    x = 252,634.68

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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.