Home / 1,990.22-2,980.55-1,110.66

Finding the Fourth Proportional to 1,990.22, 2,980.55 and 1,110.66

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Solution

The fourth proportional to 1,990.22, 2,980.55 and 1,110.66 is: 1,663.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.22 : 2,980.55 = 1,110.66 : x
  2. Step 2: Convert to fraction form
    1,990.22/2,980.55 = 1,110.66/x
  3. Step 3: Cross multiply
    1,990.22x = 2,980.55 × 1,110.66
  4. Step 4: Simplify right side
    1,990.22x = 3,310,379.78
  5. Step 5: Solve for x
    x = 3,310,379.78/1,990.22
  6. Step 6: Final answer
    x = 1,663.32

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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.