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Finding the Fourth Proportional to 280,085.80, 419,144.55 and 191,512.30

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Solution

The fourth proportional to 280,085.80, 419,144.55 and 191,512.30 is: 286,595.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,085.80 : 419,144.55 = 191,512.30 : x
  2. Step 2: Convert to fraction form
    280,085.80/419,144.55 = 191,512.30/x
  3. Step 3: Cross multiply
    280,085.80x = 419,144.55 × 191,512.30
  4. Step 4: Simplify right side
    280,085.80x = 80,271,336,802.97
  5. Step 5: Solve for x
    x = 80,271,336,802.97/280,085.80
  6. Step 6: Final answer
    x = 286,595.52

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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.