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Finding the Third Proportional to 1,380 and 2,358

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Solution

The third proportional to 1,380 and 2,358 is: 4,029.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380 : 2,358 = 2,358 : x
  2. Step 2: Convert to fraction form
    1,380/2,358 = 2,358/x
  3. Step 3: Cross multiply
    1,380x = 2,358 × 2,358
  4. Step 4: Simplify right side
    1,380x = 5,560,164
  5. Step 5: Solve for x
    x = 5,560,164/1,380
  6. Step 6: Final answer
    x = 4,029.10

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.