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Finding the Third Proportional to 684.75 and 1,506

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Solution

The third proportional to 684.75 and 1,506 is: 3,312.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.75 : 1,506 = 1,506 : x
  2. Step 2: Convert to fraction form
    684.75/1,506 = 1,506/x
  3. Step 3: Cross multiply
    684.75x = 1,506 × 1,506
  4. Step 4: Simplify right side
    684.75x = 2,268,036
  5. Step 5: Solve for x
    x = 2,268,036/684.75
  6. Step 6: Final answer
    x = 3,312.21

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.