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Finding the Fourth Proportional to 300.04, 413.86 and 189.40

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Solution

The fourth proportional to 300.04, 413.86 and 189.40 is: 261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.04 : 413.86 = 189.40 : x
  2. Step 2: Convert to fraction form
    300.04/413.86 = 189.40/x
  3. Step 3: Cross multiply
    300.04x = 413.86 × 189.40
  4. Step 4: Simplify right side
    300.04x = 78,385.08
  5. Step 5: Solve for x
    x = 78,385.08/300.04
  6. Step 6: Final answer
    x = 261.25

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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.