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Finding the Fourth Proportional to 299.64, 413.36 and 189.08

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Solution

The fourth proportional to 299.64, 413.36 and 189.08 is: 260.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.64 : 413.36 = 189.08 : x
  2. Step 2: Convert to fraction form
    299.64/413.36 = 189.08/x
  3. Step 3: Cross multiply
    299.64x = 413.36 × 189.08
  4. Step 4: Simplify right side
    299.64x = 78,158.11
  5. Step 5: Solve for x
    x = 78,158.11/299.64
  6. Step 6: Final answer
    x = 260.84

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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.