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Finding the Fourth Proportional to 342.12, 512.32 and 324.28

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Solution

The fourth proportional to 342.12, 512.32 and 324.28 is: 485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.12 : 512.32 = 324.28 : x
  2. Step 2: Convert to fraction form
    342.12/512.32 = 324.28/x
  3. Step 3: Cross multiply
    342.12x = 512.32 × 324.28
  4. Step 4: Simplify right side
    342.12x = 166,135.13
  5. Step 5: Solve for x
    x = 166,135.13/342.12
  6. Step 6: Final answer
    x = 485.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.