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Finding the Third Proportional to 1,915.88 and 3,135.38

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Solution

The third proportional to 1,915.88 and 3,135.38 is: 5,131.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.88 : 3,135.38 = 3,135.38 : x
  2. Step 2: Convert to fraction form
    1,915.88/3,135.38 = 3,135.38/x
  3. Step 3: Cross multiply
    1,915.88x = 3,135.38 × 3,135.38
  4. Step 4: Simplify right side
    1,915.88x = 9,830,576.39
  5. Step 5: Solve for x
    x = 9,830,576.39/1,915.88
  6. Step 6: Final answer
    x = 5,131.12

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.