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Finding the Fourth Proportional to 392,854.11, 541,996.65 and 256,965.66

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Solution

The fourth proportional to 392,854.11, 541,996.65 and 256,965.66 is: 354,519.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,854.11 : 541,996.65 = 256,965.66 : x
  2. Step 2: Convert to fraction form
    392,854.11/541,996.65 = 256,965.66/x
  3. Step 3: Cross multiply
    392,854.11x = 541,996.65 × 256,965.66
  4. Step 4: Simplify right side
    392,854.11x = 139,274,526,885.04
  5. Step 5: Solve for x
    x = 139,274,526,885.04/392,854.11
  6. Step 6: Final answer
    x = 354,519.71

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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.