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Finding the Fourth Proportional to 291.06, 401.31 and 192.65

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Solution

The fourth proportional to 291.06, 401.31 and 192.65 is: 265.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.06 : 401.31 = 192.65 : x
  2. Step 2: Convert to fraction form
    291.06/401.31 = 192.65/x
  3. Step 3: Cross multiply
    291.06x = 401.31 × 192.65
  4. Step 4: Simplify right side
    291.06x = 77,310.36
  5. Step 5: Solve for x
    x = 77,310.36/291.06
  6. Step 6: Final answer
    x = 265.62

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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.