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Finding the Third Proportional to 4,078 and 4,429

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Solution

The third proportional to 4,078 and 4,429 is: 4,810.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,078 : 4,429 = 4,429 : x
  2. Step 2: Convert to fraction form
    4,078/4,429 = 4,429/x
  3. Step 3: Cross multiply
    4,078x = 4,429 × 4,429
  4. Step 4: Simplify right side
    4,078x = 19,616,041
  5. Step 5: Solve for x
    x = 19,616,041/4,078
  6. Step 6: Final answer
    x = 4,810.21

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.