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Finding the Fourth Proportional to 192.12, 286.71 and 187.26

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Solution

The fourth proportional to 192.12, 286.71 and 187.26 is: 279.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.12 : 286.71 = 187.26 : x
  2. Step 2: Convert to fraction form
    192.12/286.71 = 187.26/x
  3. Step 3: Cross multiply
    192.12x = 286.71 × 187.26
  4. Step 4: Simplify right side
    192.12x = 53,689.31
  5. Step 5: Solve for x
    x = 53,689.31/192.12
  6. Step 6: Final answer
    x = 279.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.