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Finding the Fourth Proportional to 192.98, 266.23 and 115.31

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Solution

The fourth proportional to 192.98, 266.23 and 115.31 is: 159.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.98 : 266.23 = 115.31 : x
  2. Step 2: Convert to fraction form
    192.98/266.23 = 115.31/x
  3. Step 3: Cross multiply
    192.98x = 266.23 × 115.31
  4. Step 4: Simplify right side
    192.98x = 30,699.79
  5. Step 5: Solve for x
    x = 30,699.79/192.98
  6. Step 6: Final answer
    x = 159.08

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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.