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Finding the Fourth Proportional to 306,169.20, 422,512.20 and 172,033.20

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Solution

The fourth proportional to 306,169.20, 422,512.20 and 172,033.20 is: 237,405.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,169.20 : 422,512.20 = 172,033.20 : x
  2. Step 2: Convert to fraction form
    306,169.20/422,512.20 = 172,033.20/x
  3. Step 3: Cross multiply
    306,169.20x = 422,512.20 × 172,033.20
  4. Step 4: Simplify right side
    306,169.20x = 72,686,125,805.04
  5. Step 5: Solve for x
    x = 72,686,125,805.04/306,169.20
  6. Step 6: Final answer
    x = 237,405.09

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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.