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Finding the Fourth Proportional to 324.27, 485.55 and 255.93

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Solution

The fourth proportional to 324.27, 485.55 and 255.93 is: 383.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.27 : 485.55 = 255.93 : x
  2. Step 2: Convert to fraction form
    324.27/485.55 = 255.93/x
  3. Step 3: Cross multiply
    324.27x = 485.55 × 255.93
  4. Step 4: Simplify right side
    324.27x = 124,266.81
  5. Step 5: Solve for x
    x = 124,266.81/324.27
  6. Step 6: Final answer
    x = 383.22

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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.