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Finding the Third Proportional to 875 and 1,073

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Solution

The third proportional to 875 and 1,073 is: 1,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    875 : 1,073 = 1,073 : x
  2. Step 2: Convert to fraction form
    875/1,073 = 1,073/x
  3. Step 3: Cross multiply
    875x = 1,073 × 1,073
  4. Step 4: Simplify right side
    875x = 1,151,329
  5. Step 5: Solve for x
    x = 1,151,329/875
  6. Step 6: Final answer
    x = 1,315.80

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Why These Related Problems?

These problems maintain the same ratio (1.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.