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Finding the Fourth Proportional to 299.90, 413.71 and 189.19

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Solution

The fourth proportional to 299.90, 413.71 and 189.19 is: 260.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.90 : 413.71 = 189.19 : x
  2. Step 2: Convert to fraction form
    299.90/413.71 = 189.19/x
  3. Step 3: Cross multiply
    299.90x = 413.71 × 189.19
  4. Step 4: Simplify right side
    299.90x = 78,267.51
  5. Step 5: Solve for x
    x = 78,267.51/299.90
  6. Step 6: Final answer
    x = 260.98

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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.