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Finding the Fourth Proportional to 1,106.26, 1,659.86 and 413.24

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Solution

The fourth proportional to 1,106.26, 1,659.86 and 413.24 is: 620.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.26 : 1,659.86 = 413.24 : x
  2. Step 2: Convert to fraction form
    1,106.26/1,659.86 = 413.24/x
  3. Step 3: Cross multiply
    1,106.26x = 1,659.86 × 413.24
  4. Step 4: Simplify right side
    1,106.26x = 685,920.55
  5. Step 5: Solve for x
    x = 685,920.55/1,106.26
  6. Step 6: Final answer
    x = 620.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.