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Finding the Fourth Proportional to 315,796.68, 435,794.22 and 172,553.64

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Solution

The fourth proportional to 315,796.68, 435,794.22 and 172,553.64 is: 238,121.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,796.68 : 435,794.22 = 172,553.64 : x
  2. Step 2: Convert to fraction form
    315,796.68/435,794.22 = 172,553.64/x
  3. Step 3: Cross multiply
    315,796.68x = 435,794.22 × 172,553.64
  4. Step 4: Simplify right side
    315,796.68x = 75,197,878,951.96
  5. Step 5: Solve for x
    x = 75,197,878,951.96/315,796.68
  6. Step 6: Final answer
    x = 238,121.18

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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.