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Finding the Third Proportional to 956 and 1,688

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Solution

The third proportional to 956 and 1,688 is: 2,980.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    956 : 1,688 = 1,688 : x
  2. Step 2: Convert to fraction form
    956/1,688 = 1,688/x
  3. Step 3: Cross multiply
    956x = 1,688 × 1,688
  4. Step 4: Simplify right side
    956x = 2,849,344
  5. Step 5: Solve for x
    x = 2,849,344/956
  6. Step 6: Final answer
    x = 2,980.49

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.