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Finding the Third Proportional to 1,988,939.81 and 4,342,242.94

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Solution

The third proportional to 1,988,939.81 and 4,342,242.94 is: 9,479,961.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,939.81 : 4,342,242.94 = 4,342,242.94 : x
  2. Step 2: Convert to fraction form
    1,988,939.81/4,342,242.94 = 4,342,242.94/x
  3. Step 3: Cross multiply
    1,988,939.81x = 4,342,242.94 × 4,342,242.94
  4. Step 4: Simplify right side
    1,988,939.81x = 18,855,073,728,268.63
  5. Step 5: Solve for x
    x = 18,855,073,728,268.63/1,988,939.81
  6. Step 6: Final answer
    x = 9,479,961.94

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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.