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Finding the Fourth Proportional to 1,905.88, 2,859.44 and 811.17

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Solution

The fourth proportional to 1,905.88, 2,859.44 and 811.17 is: 1,217.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.88 : 2,859.44 = 811.17 : x
  2. Step 2: Convert to fraction form
    1,905.88/2,859.44 = 811.17/x
  3. Step 3: Cross multiply
    1,905.88x = 2,859.44 × 811.17
  4. Step 4: Simplify right side
    1,905.88x = 2,319,491.94
  5. Step 5: Solve for x
    x = 2,319,491.94/1,905.88
  6. Step 6: Final answer
    x = 1,217.02

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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.