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Finding the Third Proportional to 985 and 2,133

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Solution

The third proportional to 985 and 2,133 is: 4,618.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    985 : 2,133 = 2,133 : x
  2. Step 2: Convert to fraction form
    985/2,133 = 2,133/x
  3. Step 3: Cross multiply
    985x = 2,133 × 2,133
  4. Step 4: Simplify right side
    985x = 4,549,689
  5. Step 5: Solve for x
    x = 4,549,689/985
  6. Step 6: Final answer
    x = 4,618.97

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.