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Finding the Third Proportional to 988.88 and 2,129.63

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Solution

The third proportional to 988.88 and 2,129.63 is: 4,586.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.88 : 2,129.63 = 2,129.63 : x
  2. Step 2: Convert to fraction form
    988.88/2,129.63 = 2,129.63/x
  3. Step 3: Cross multiply
    988.88x = 2,129.63 × 2,129.63
  4. Step 4: Simplify right side
    988.88x = 4,535,302.64
  5. Step 5: Solve for x
    x = 4,535,302.64/988.88
  6. Step 6: Final answer
    x = 4,586.33

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.