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Finding the Fourth Proportional to 279.88, 386.04 and 192.76

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Solution

The fourth proportional to 279.88, 386.04 and 192.76 is: 265.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.88 : 386.04 = 192.76 : x
  2. Step 2: Convert to fraction form
    279.88/386.04 = 192.76/x
  3. Step 3: Cross multiply
    279.88x = 386.04 × 192.76
  4. Step 4: Simplify right side
    279.88x = 74,413.07
  5. Step 5: Solve for x
    x = 74,413.07/279.88
  6. Step 6: Final answer
    x = 265.87

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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.