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Finding the Fourth Proportional to 315,310.33, 435,137.43 and 172,079.61

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Solution

The fourth proportional to 315,310.33, 435,137.43 and 172,079.61 is: 237,474.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,310.33 : 435,137.43 = 172,079.61 : x
  2. Step 2: Convert to fraction form
    315,310.33/435,137.43 = 172,079.61/x
  3. Step 3: Cross multiply
    315,310.33x = 435,137.43 × 172,079.61
  4. Step 4: Simplify right side
    315,310.33x = 74,878,279,250.80
  5. Step 5: Solve for x
    x = 74,878,279,250.80/315,310.33
  6. Step 6: Final answer
    x = 237,474.87

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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.