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Finding the Fourth Proportional to 306,321.21, 422,661.21 and 178,972.20

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Solution

The fourth proportional to 306,321.21, 422,661.21 and 178,972.20 is: 246,945.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,321.21 : 422,661.21 = 178,972.20 : x
  2. Step 2: Convert to fraction form
    306,321.21/422,661.21 = 178,972.20/x
  3. Step 3: Cross multiply
    306,321.21x = 422,661.21 × 178,972.20
  4. Step 4: Simplify right side
    306,321.21x = 75,644,606,608.36
  5. Step 5: Solve for x
    x = 75,644,606,608.36/306,321.21
  6. Step 6: Final answer
    x = 246,945.38

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1.5x scale

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.