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Finding the Fourth Proportional to 324.36, 485.40 and 276.84

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Solution

The fourth proportional to 324.36, 485.40 and 276.84 is: 414.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.36 : 485.40 = 276.84 : x
  2. Step 2: Convert to fraction form
    324.36/485.40 = 276.84/x
  3. Step 3: Cross multiply
    324.36x = 485.40 × 276.84
  4. Step 4: Simplify right side
    324.36x = 134,378.14
  5. Step 5: Solve for x
    x = 134,378.14/324.36
  6. Step 6: Final answer
    x = 414.29

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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.