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Finding the Fourth Proportional to 306,395.22, 422,825.39 and 172,259.22

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Solution

The fourth proportional to 306,395.22, 422,825.39 and 172,259.22 is: 237,717.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,395.22 : 422,825.39 = 172,259.22 : x
  2. Step 2: Convert to fraction form
    306,395.22/422,825.39 = 172,259.22/x
  3. Step 3: Cross multiply
    306,395.22x = 422,825.39 × 172,259.22
  4. Step 4: Simplify right side
    306,395.22x = 72,835,571,016.30
  5. Step 5: Solve for x
    x = 72,835,571,016.30/306,395.22
  6. Step 6: Final answer
    x = 237,717.71

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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.