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Finding the Fourth Proportional to 324, 449.55 and 321.48

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Solution

The fourth proportional to 324, 449.55 and 321.48 is: 446.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    324 : 449.55 = 321.48 : x
  2. Step 2: Convert to fraction form
    324/449.55 = 321.48/x
  3. Step 3: Cross multiply
    324x = 449.55 × 321.48
  4. Step 4: Simplify right side
    324x = 144,521.33
  5. Step 5: Solve for x
    x = 144,521.33/324
  6. Step 6: Final answer
    x = 446.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.