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Finding the Fourth Proportional to 331.47, 457.67 and 213.61

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Solution

The fourth proportional to 331.47, 457.67 and 213.61 is: 294.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.47 : 457.67 = 213.61 : x
  2. Step 2: Convert to fraction form
    331.47/457.67 = 213.61/x
  3. Step 3: Cross multiply
    331.47x = 457.67 × 213.61
  4. Step 4: Simplify right side
    331.47x = 97,762.89
  5. Step 5: Solve for x
    x = 97,762.89/331.47
  6. Step 6: Final answer
    x = 294.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.