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Finding the Fourth Proportional to 391,039.41, 539,632.49 and 212,191.41

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Solution

The fourth proportional to 391,039.41, 539,632.49 and 212,191.41 is: 292,823.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,039.41 : 539,632.49 = 212,191.41 : x
  2. Step 2: Convert to fraction form
    391,039.41/539,632.49 = 212,191.41/x
  3. Step 3: Cross multiply
    391,039.41x = 539,632.49 × 212,191.41
  4. Step 4: Simplify right side
    391,039.41x = 114,505,377,873.95
  5. Step 5: Solve for x
    x = 114,505,377,873.95/391,039.41
  6. Step 6: Final answer
    x = 292,823.11

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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.