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Finding the Third Proportional to 1,681 and 3,686.50

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Solution

The third proportional to 1,681 and 3,686.50 is: 8,084.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681 : 3,686.50 = 3,686.50 : x
  2. Step 2: Convert to fraction form
    1,681/3,686.50 = 3,686.50/x
  3. Step 3: Cross multiply
    1,681x = 3,686.50 × 3,686.50
  4. Step 4: Simplify right side
    1,681x = 13,590,282.25
  5. Step 5: Solve for x
    x = 13,590,282.25/1,681
  6. Step 6: Final answer
    x = 8,084.64

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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.