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Finding the Third Proportional to 1,988 and 4,679

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Solution

The third proportional to 1,988 and 4,679 is: 11,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988 : 4,679 = 4,679 : x
  2. Step 2: Convert to fraction form
    1,988/4,679 = 4,679/x
  3. Step 3: Cross multiply
    1,988x = 4,679 × 4,679
  4. Step 4: Simplify right side
    1,988x = 21,893,041
  5. Step 5: Solve for x
    x = 21,893,041/1,988
  6. Step 6: Final answer
    x = 11,012.60

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.