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Finding the Third Proportional to 368.16 and 486.42

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Solution

The third proportional to 368.16 and 486.42 is: 642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.16 : 486.42 = 486.42 : x
  2. Step 2: Convert to fraction form
    368.16/486.42 = 486.42/x
  3. Step 3: Cross multiply
    368.16x = 486.42 × 486.42
  4. Step 4: Simplify right side
    368.16x = 236,606.24
  5. Step 5: Solve for x
    x = 236,606.24/368.16
  6. Step 6: Final answer
    x = 642.68

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.