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Finding the Third Proportional to 2,142 and 4,429

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Solution

The third proportional to 2,142 and 4,429 is: 9,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142 : 4,429 = 4,429 : x
  2. Step 2: Convert to fraction form
    2,142/4,429 = 4,429/x
  3. Step 3: Cross multiply
    2,142x = 4,429 × 4,429
  4. Step 4: Simplify right side
    2,142x = 19,616,041
  5. Step 5: Solve for x
    x = 19,616,041/2,142
  6. Step 6: Final answer
    x = 9,157.82

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.