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Finding the Fourth Proportional to 3,611.69, 4,984.13 and 1,955.69

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Solution

The fourth proportional to 3,611.69, 4,984.13 and 1,955.69 is: 2,698.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.69 : 4,984.13 = 1,955.69 : x
  2. Step 2: Convert to fraction form
    3,611.69/4,984.13 = 1,955.69/x
  3. Step 3: Cross multiply
    3,611.69x = 4,984.13 × 1,955.69
  4. Step 4: Simplify right side
    3,611.69x = 9,747,413.20
  5. Step 5: Solve for x
    x = 9,747,413.20/3,611.69
  6. Step 6: Final answer
    x = 2,698.85

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Double scale
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Similar ratio
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1.5x scale

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.