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Finding the Third Proportional to 328.90 and 512.58

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Solution

The third proportional to 328.90 and 512.58 is: 798.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.90 : 512.58 = 512.58 : x
  2. Step 2: Convert to fraction form
    328.90/512.58 = 512.58/x
  3. Step 3: Cross multiply
    328.90x = 512.58 × 512.58
  4. Step 4: Simplify right side
    328.90x = 262,736.33
  5. Step 5: Solve for x
    x = 262,736.33/328.90
  6. Step 6: Final answer
    x = 798.82

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.