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Finding the Fourth Proportional to 391,114.83, 539,738.69 and 212,266.83

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Solution

The fourth proportional to 391,114.83, 539,738.69 and 212,266.83 is: 292,928.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,114.83 : 539,738.69 = 212,266.83 : x
  2. Step 2: Convert to fraction form
    391,114.83/539,738.69 = 212,266.83/x
  3. Step 3: Cross multiply
    391,114.83x = 539,738.69 × 212,266.83
  4. Step 4: Simplify right side
    391,114.83x = 114,568,620,754.65
  5. Step 5: Solve for x
    x = 114,568,620,754.65/391,114.83
  6. Step 6: Final answer
    x = 292,928.35

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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.