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Finding the Fourth Proportional to 315,874.04, 435,906.21 and 172,634.04

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Solution

The fourth proportional to 315,874.04, 435,906.21 and 172,634.04 is: 238,234.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,874.04 : 435,906.21 = 172,634.04 : x
  2. Step 2: Convert to fraction form
    315,874.04/435,906.21 = 172,634.04/x
  3. Step 3: Cross multiply
    315,874.04x = 435,906.21 × 172,634.04
  4. Step 4: Simplify right side
    315,874.04x = 75,252,250,093.39
  5. Step 5: Solve for x
    x = 75,252,250,093.39/315,874.04
  6. Step 6: Final answer
    x = 238,234.99

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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.