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Finding the Third Proportional to 642.38 and 1,551.94

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Solution

The third proportional to 642.38 and 1,551.94 is: 3,749.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.38 : 1,551.94 = 1,551.94 : x
  2. Step 2: Convert to fraction form
    642.38/1,551.94 = 1,551.94/x
  3. Step 3: Cross multiply
    642.38x = 1,551.94 × 1,551.94
  4. Step 4: Simplify right side
    642.38x = 2,408,510.00
  5. Step 5: Solve for x
    x = 2,408,510.00/642.38
  6. Step 6: Final answer
    x = 3,749.38

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.