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Finding the Fourth Proportional to 248.15, 342.61 and 192.80

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Solution

The fourth proportional to 248.15, 342.61 and 192.80 is: 266.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.15 : 342.61 = 192.80 : x
  2. Step 2: Convert to fraction form
    248.15/342.61 = 192.80/x
  3. Step 3: Cross multiply
    248.15x = 342.61 × 192.80
  4. Step 4: Simplify right side
    248.15x = 66,055.21
  5. Step 5: Solve for x
    x = 66,055.21/248.15
  6. Step 6: Final answer
    x = 266.19

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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.