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Finding the Fourth Proportional to 331.83, 457.58 and 238.88

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Solution

The fourth proportional to 331.83, 457.58 and 238.88 is: 329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.83 : 457.58 = 238.88 : x
  2. Step 2: Convert to fraction form
    331.83/457.58 = 238.88/x
  3. Step 3: Cross multiply
    331.83x = 457.58 × 238.88
  4. Step 4: Simplify right side
    331.83x = 109,303.23
  5. Step 5: Solve for x
    x = 109,303.23/331.83
  6. Step 6: Final answer
    x = 329.40

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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.