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Finding the Third Proportional to 990.35 and 2,157.26

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Solution

The third proportional to 990.35 and 2,157.26 is: 4,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.35 : 2,157.26 = 2,157.26 : x
  2. Step 2: Convert to fraction form
    990.35/2,157.26 = 2,157.26/x
  3. Step 3: Cross multiply
    990.35x = 2,157.26 × 2,157.26
  4. Step 4: Simplify right side
    990.35x = 4,653,761.27
  5. Step 5: Solve for x
    x = 4,653,761.27/990.35
  6. Step 6: Final answer
    x = 4,699.10

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.