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Finding the Third Proportional to 1,240 and 1,348

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Solution

The third proportional to 1,240 and 1,348 is: 1,465.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240 : 1,348 = 1,348 : x
  2. Step 2: Convert to fraction form
    1,240/1,348 = 1,348/x
  3. Step 3: Cross multiply
    1,240x = 1,348 × 1,348
  4. Step 4: Simplify right side
    1,240x = 1,817,104
  5. Step 5: Solve for x
    x = 1,817,104/1,240
  6. Step 6: Final answer
    x = 1,465.41

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.