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Finding the Fourth Proportional to 315,863.27, 435,891.55 and 172,623.33

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Solution

The fourth proportional to 315,863.27, 435,891.55 and 172,623.33 is: 238,220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,863.27 : 435,891.55 = 172,623.33 : x
  2. Step 2: Convert to fraction form
    315,863.27/435,891.55 = 172,623.33/x
  3. Step 3: Cross multiply
    315,863.27x = 435,891.55 × 172,623.33
  4. Step 4: Simplify right side
    315,863.27x = 75,245,050,879.86
  5. Step 5: Solve for x
    x = 75,245,050,879.86/315,863.27
  6. Step 6: Final answer
    x = 238,220.33

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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.