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Finding the Third Proportional to 970.50 and 1,170

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Solution

The third proportional to 970.50 and 1,170 is: 1,410.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.50 : 1,170 = 1,170 : x
  2. Step 2: Convert to fraction form
    970.50/1,170 = 1,170/x
  3. Step 3: Cross multiply
    970.50x = 1,170 × 1,170
  4. Step 4: Simplify right side
    970.50x = 1,368,900
  5. Step 5: Solve for x
    x = 1,368,900/970.50
  6. Step 6: Final answer
    x = 1,410.51

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.