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Finding the Third Proportional to 1,890 and 2,929

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Solution

The third proportional to 1,890 and 2,929 is: 4,539.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890 : 2,929 = 2,929 : x
  2. Step 2: Convert to fraction form
    1,890/2,929 = 2,929/x
  3. Step 3: Cross multiply
    1,890x = 2,929 × 2,929
  4. Step 4: Simplify right side
    1,890x = 8,579,041
  5. Step 5: Solve for x
    x = 8,579,041/1,890
  6. Step 6: Final answer
    x = 4,539.18

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.