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Finding the Third Proportional to 1,362.19 and 2,176.69

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Solution

The third proportional to 1,362.19 and 2,176.69 is: 3,478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.19 : 2,176.69 = 2,176.69 : x
  2. Step 2: Convert to fraction form
    1,362.19/2,176.69 = 2,176.69/x
  3. Step 3: Cross multiply
    1,362.19x = 2,176.69 × 2,176.69
  4. Step 4: Simplify right side
    1,362.19x = 4,737,968.47
  5. Step 5: Solve for x
    x = 4,737,968.47/1,362.19
  6. Step 6: Final answer
    x = 3,478.21

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.