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Finding the Fourth Proportional to 342.78, 510.91 and 323.32

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Solution

The fourth proportional to 342.78, 510.91 and 323.32 is: 481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.78 : 510.91 = 323.32 : x
  2. Step 2: Convert to fraction form
    342.78/510.91 = 323.32/x
  3. Step 3: Cross multiply
    342.78x = 510.91 × 323.32
  4. Step 4: Simplify right side
    342.78x = 165,183.25
  5. Step 5: Solve for x
    x = 165,183.25/342.78
  6. Step 6: Final answer
    x = 481.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.