Home / 1,169.21-1,611.61-1,103.60

Finding the Fourth Proportional to 1,169.21, 1,611.61 and 1,103.60

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Solution

The fourth proportional to 1,169.21, 1,611.61 and 1,103.60 is: 1,521.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.21 : 1,611.61 = 1,103.60 : x
  2. Step 2: Convert to fraction form
    1,169.21/1,611.61 = 1,103.60/x
  3. Step 3: Cross multiply
    1,169.21x = 1,611.61 × 1,103.60
  4. Step 4: Simplify right side
    1,169.21x = 1,778,561.98
  5. Step 5: Solve for x
    x = 1,778,561.98/1,169.21
  6. Step 6: Final answer
    x = 1,521.17

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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.