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Finding the Fourth Proportional to 299.51, 413.30 and 211.03

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Solution

The fourth proportional to 299.51, 413.30 and 211.03 is: 291.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.51 : 413.30 = 211.03 : x
  2. Step 2: Convert to fraction form
    299.51/413.30 = 211.03/x
  3. Step 3: Cross multiply
    299.51x = 413.30 × 211.03
  4. Step 4: Simplify right side
    299.51x = 87,219.36
  5. Step 5: Solve for x
    x = 87,219.36/299.51
  6. Step 6: Final answer
    x = 291.21

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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.