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Finding the Third Proportional to 947 and 1,335

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Solution

The third proportional to 947 and 1,335 is: 1,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    947 : 1,335 = 1,335 : x
  2. Step 2: Convert to fraction form
    947/1,335 = 1,335/x
  3. Step 3: Cross multiply
    947x = 1,335 × 1,335
  4. Step 4: Simplify right side
    947x = 1,782,225
  5. Step 5: Solve for x
    x = 1,782,225/947
  6. Step 6: Final answer
    x = 1,881.97

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.