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Finding the Third Proportional to 919.31 and 1,351.13

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Solution

The third proportional to 919.31 and 1,351.13 is: 1,985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.31 : 1,351.13 = 1,351.13 : x
  2. Step 2: Convert to fraction form
    919.31/1,351.13 = 1,351.13/x
  3. Step 3: Cross multiply
    919.31x = 1,351.13 × 1,351.13
  4. Step 4: Simplify right side
    919.31x = 1,825,538.77
  5. Step 5: Solve for x
    x = 1,825,538.77/919.31
  6. Step 6: Final answer
    x = 1,985.77

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.