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Finding the Third Proportional to 964 and 1,405

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Solution

The third proportional to 964 and 1,405 is: 2,047.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    964 : 1,405 = 1,405 : x
  2. Step 2: Convert to fraction form
    964/1,405 = 1,405/x
  3. Step 3: Cross multiply
    964x = 1,405 × 1,405
  4. Step 4: Simplify right side
    964x = 1,974,025
  5. Step 5: Solve for x
    x = 1,974,025/964
  6. Step 6: Final answer
    x = 2,047.74

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.