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Finding the Fourth Proportional to 303.51, 418.86 and 238.31

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Solution

The fourth proportional to 303.51, 418.86 and 238.31 is: 328.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.51 : 418.86 = 238.31 : x
  2. Step 2: Convert to fraction form
    303.51/418.86 = 238.31/x
  3. Step 3: Cross multiply
    303.51x = 418.86 × 238.31
  4. Step 4: Simplify right side
    303.51x = 99,818.53
  5. Step 5: Solve for x
    x = 99,818.53/303.51
  6. Step 6: Final answer
    x = 328.88

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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.