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Finding the Fourth Proportional to 299.07, 412.44 and 186.90

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Solution

The fourth proportional to 299.07, 412.44 and 186.90 is: 257.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.07 : 412.44 = 186.90 : x
  2. Step 2: Convert to fraction form
    299.07/412.44 = 186.90/x
  3. Step 3: Cross multiply
    299.07x = 412.44 × 186.90
  4. Step 4: Simplify right side
    299.07x = 77,085.04
  5. Step 5: Solve for x
    x = 77,085.04/299.07
  6. Step 6: Final answer
    x = 257.75

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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.