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Finding the Fourth Proportional to 304.85, 457.21 and 131.61

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Solution

The fourth proportional to 304.85, 457.21 and 131.61 is: 197.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.85 : 457.21 = 131.61 : x
  2. Step 2: Convert to fraction form
    304.85/457.21 = 131.61/x
  3. Step 3: Cross multiply
    304.85x = 457.21 × 131.61
  4. Step 4: Simplify right side
    304.85x = 60,173.41
  5. Step 5: Solve for x
    x = 60,173.41/304.85
  6. Step 6: Final answer
    x = 197.39

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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.