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Finding the Fourth Proportional to 306,398.97, 422,830.55 and 172,262.97

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Solution

The fourth proportional to 306,398.97, 422,830.55 and 172,262.97 is: 237,722.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,398.97 : 422,830.55 = 172,262.97 : x
  2. Step 2: Convert to fraction form
    306,398.97/422,830.55 = 172,262.97/x
  3. Step 3: Cross multiply
    306,398.97x = 422,830.55 × 172,262.97
  4. Step 4: Simplify right side
    306,398.97x = 72,838,046,780.39
  5. Step 5: Solve for x
    x = 72,838,046,780.39/306,398.97
  6. Step 6: Final answer
    x = 237,722.88

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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.