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Finding the Fourth Proportional to 192.65, 265.78 and 155.79

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Solution

The fourth proportional to 192.65, 265.78 and 155.79 is: 214.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.65 : 265.78 = 155.79 : x
  2. Step 2: Convert to fraction form
    192.65/265.78 = 155.79/x
  3. Step 3: Cross multiply
    192.65x = 265.78 × 155.79
  4. Step 4: Simplify right side
    192.65x = 41,406.06
  5. Step 5: Solve for x
    x = 41,406.06/192.65
  6. Step 6: Final answer
    x = 214.93

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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.