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Finding the Fourth Proportional to 306,175.20, 422,520.48 and 172,039.20

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Solution

The fourth proportional to 306,175.20, 422,520.48 and 172,039.20 is: 237,413.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,175.20 : 422,520.48 = 172,039.20 : x
  2. Step 2: Convert to fraction form
    306,175.20/422,520.48 = 172,039.20/x
  3. Step 3: Cross multiply
    306,175.20x = 422,520.48 × 172,039.20
  4. Step 4: Simplify right side
    306,175.20x = 72,690,085,362.82
  5. Step 5: Solve for x
    x = 72,690,085,362.82/306,175.20
  6. Step 6: Final answer
    x = 237,413.37

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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.