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Finding the Third Proportional to 972.75 and 2,124.38

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Solution

The third proportional to 972.75 and 2,124.38 is: 4,639.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.75 : 2,124.38 = 2,124.38 : x
  2. Step 2: Convert to fraction form
    972.75/2,124.38 = 2,124.38/x
  3. Step 3: Cross multiply
    972.75x = 2,124.38 × 2,124.38
  4. Step 4: Simplify right side
    972.75x = 4,512,969.14
  5. Step 5: Solve for x
    x = 4,512,969.14/972.75
  6. Step 6: Final answer
    x = 4,639.39

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.