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Finding the Third Proportional to 1,374.19 and 1,491.19

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Solution

The third proportional to 1,374.19 and 1,491.19 is: 1,618.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.19 : 1,491.19 = 1,491.19 : x
  2. Step 2: Convert to fraction form
    1,374.19/1,491.19 = 1,491.19/x
  3. Step 3: Cross multiply
    1,374.19x = 1,491.19 × 1,491.19
  4. Step 4: Simplify right side
    1,374.19x = 2,223,640.16
  5. Step 5: Solve for x
    x = 2,223,640.16/1,374.19
  6. Step 6: Final answer
    x = 1,618.15

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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.