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Finding the Fourth Proportional to 279,919, 386,426.13 and 193,943.17

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Solution

The fourth proportional to 279,919, 386,426.13 and 193,943.17 is: 267,737.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,919 : 386,426.13 = 193,943.17 : x
  2. Step 2: Convert to fraction form
    279,919/386,426.13 = 193,943.17/x
  3. Step 3: Cross multiply
    279,919x = 386,426.13 × 193,943.17
  4. Step 4: Simplify right side
    279,919x = 74,944,708,623.03
  5. Step 5: Solve for x
    x = 74,944,708,623.03/279,919
  6. Step 6: Final answer
    x = 267,737.13

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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.