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Finding the Fourth Proportional to 248.36, 342.23 and 231.06

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Solution

The fourth proportional to 248.36, 342.23 and 231.06 is: 318.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.36 : 342.23 = 231.06 : x
  2. Step 2: Convert to fraction form
    248.36/342.23 = 231.06/x
  3. Step 3: Cross multiply
    248.36x = 342.23 × 231.06
  4. Step 4: Simplify right side
    248.36x = 79,075.66
  5. Step 5: Solve for x
    x = 79,075.66/248.36
  6. Step 6: Final answer
    x = 318.39

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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.