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Finding the Third Proportional to 1,122 and 1,458

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Solution

The third proportional to 1,122 and 1,458 is: 1,894.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122 : 1,458 = 1,458 : x
  2. Step 2: Convert to fraction form
    1,122/1,458 = 1,458/x
  3. Step 3: Cross multiply
    1,122x = 1,458 × 1,458
  4. Step 4: Simplify right side
    1,122x = 2,125,764
  5. Step 5: Solve for x
    x = 2,125,764/1,122
  6. Step 6: Final answer
    x = 1,894.62

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.