Home / 280,366.22-420,387.74-191,727.12

Finding the Fourth Proportional to 280,366.22, 420,387.74 and 191,727.12

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Solution

The fourth proportional to 280,366.22, 420,387.74 and 191,727.12 is: 287,480.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,366.22 : 420,387.74 = 191,727.12 : x
  2. Step 2: Convert to fraction form
    280,366.22/420,387.74 = 191,727.12/x
  3. Step 3: Cross multiply
    280,366.22x = 420,387.74 × 191,727.12
  4. Step 4: Simplify right side
    280,366.22x = 80,599,730,673.51
  5. Step 5: Solve for x
    x = 80,599,730,673.51/280,366.22
  6. Step 6: Final answer
    x = 287,480.18

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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.