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Finding the Third Proportional to 3,240 and 4,236

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Solution

The third proportional to 3,240 and 4,236 is: 5,538.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240 : 4,236 = 4,236 : x
  2. Step 2: Convert to fraction form
    3,240/4,236 = 4,236/x
  3. Step 3: Cross multiply
    3,240x = 4,236 × 4,236
  4. Step 4: Simplify right side
    3,240x = 17,943,696
  5. Step 5: Solve for x
    x = 17,943,696/3,240
  6. Step 6: Final answer
    x = 5,538.18

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.