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Finding the Fourth Proportional to 391,170.70, 587,144.85 and 191,716.30

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Solution

The fourth proportional to 391,170.70, 587,144.85 and 191,716.30 is: 287,765.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,170.70 : 587,144.85 = 191,716.30 : x
  2. Step 2: Convert to fraction form
    391,170.70/587,144.85 = 191,716.30/x
  3. Step 3: Cross multiply
    391,170.70x = 587,144.85 × 191,716.30
  4. Step 4: Simplify right side
    391,170.70x = 112,565,238,206.06
  5. Step 5: Solve for x
    x = 112,565,238,206.06/391,170.70
  6. Step 6: Final answer
    x = 287,765.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.