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Finding the Fourth Proportional to 3,486.57, 4,811.57 and 1,914.77

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Solution

The fourth proportional to 3,486.57, 4,811.57 and 1,914.77 is: 2,642.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.57 : 4,811.57 = 1,914.77 : x
  2. Step 2: Convert to fraction form
    3,486.57/4,811.57 = 1,914.77/x
  3. Step 3: Cross multiply
    3,486.57x = 4,811.57 × 1,914.77
  4. Step 4: Simplify right side
    3,486.57x = 9,213,016.26
  5. Step 5: Solve for x
    x = 9,213,016.26/3,486.57
  6. Step 6: Final answer
    x = 2,642.43

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.