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Finding the Third Proportional to 1,785.16 and 3,915.21

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Solution

The third proportional to 1,785.16 and 3,915.21 is: 8,586.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.16 : 3,915.21 = 3,915.21 : x
  2. Step 2: Convert to fraction form
    1,785.16/3,915.21 = 3,915.21/x
  3. Step 3: Cross multiply
    1,785.16x = 3,915.21 × 3,915.21
  4. Step 4: Simplify right side
    1,785.16x = 15,328,876.69
  5. Step 5: Solve for x
    x = 15,328,876.69/1,785.16
  6. Step 6: Final answer
    x = 8,586.82

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.