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Finding the Fourth Proportional to 248.36, 342.90 and 161.16

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Solution

The fourth proportional to 248.36, 342.90 and 161.16 is: 222.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.36 : 342.90 = 161.16 : x
  2. Step 2: Convert to fraction form
    248.36/342.90 = 161.16/x
  3. Step 3: Cross multiply
    248.36x = 342.90 × 161.16
  4. Step 4: Simplify right side
    248.36x = 55,261.76
  5. Step 5: Solve for x
    x = 55,261.76/248.36
  6. Step 6: Final answer
    x = 222.51

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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.