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Finding the Third Proportional to 374.63 and 398.25

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Solution

The third proportional to 374.63 and 398.25 is: 423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.63 : 398.25 = 398.25 : x
  2. Step 2: Convert to fraction form
    374.63/398.25 = 398.25/x
  3. Step 3: Cross multiply
    374.63x = 398.25 × 398.25
  4. Step 4: Simplify right side
    374.63x = 158,603.06
  5. Step 5: Solve for x
    x = 158,603.06/374.63
  6. Step 6: Final answer
    x = 423.36

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Why These Related Problems?

These problems maintain the same ratio (1.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.