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Finding the Fourth Proportional to 391,479.15, 587,230.91 and 186,268.84

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Solution

The fourth proportional to 391,479.15, 587,230.91 and 186,268.84 is: 279,409.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,479.15 : 587,230.91 = 186,268.84 : x
  2. Step 2: Convert to fraction form
    391,479.15/587,230.91 = 186,268.84/x
  3. Step 3: Cross multiply
    391,479.15x = 587,230.91 × 186,268.84
  4. Step 4: Simplify right side
    391,479.15x = 109,382,821,416.28
  5. Step 5: Solve for x
    x = 109,382,821,416.28/391,479.15
  6. Step 6: Final answer
    x = 279,409.06

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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.