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Finding the Fourth Proportional to 306,370, 422,790.60 and 172,234.96

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Solution

The fourth proportional to 306,370, 422,790.60 and 172,234.96 is: 237,684.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,370 : 422,790.60 = 172,234.96 : x
  2. Step 2: Convert to fraction form
    306,370/422,790.60 = 172,234.96/x
  3. Step 3: Cross multiply
    306,370x = 422,790.60 × 172,234.96
  4. Step 4: Simplify right side
    306,370x = 72,819,322,079.38
  5. Step 5: Solve for x
    x = 72,819,322,079.38/306,370
  6. Step 6: Final answer
    x = 237,684.24

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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.