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Finding the Fourth Proportional to 324.41, 485.91 and 285.98

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Solution

The fourth proportional to 324.41, 485.91 and 285.98 is: 428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.41 : 485.91 = 285.98 : x
  2. Step 2: Convert to fraction form
    324.41/485.91 = 285.98/x
  3. Step 3: Cross multiply
    324.41x = 485.91 × 285.98
  4. Step 4: Simplify right side
    324.41x = 138,958.11
  5. Step 5: Solve for x
    x = 138,958.11/324.41
  6. Step 6: Final answer
    x = 428.35

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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.