Home / 1,918.69-2,647.79-1,090.69

Finding the Fourth Proportional to 1,918.69, 2,647.79 and 1,090.69

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Solution

The fourth proportional to 1,918.69, 2,647.79 and 1,090.69 is: 1,505.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.69 : 2,647.79 = 1,090.69 : x
  2. Step 2: Convert to fraction form
    1,918.69/2,647.79 = 1,090.69/x
  3. Step 3: Cross multiply
    1,918.69x = 2,647.79 × 1,090.69
  4. Step 4: Simplify right side
    1,918.69x = 2,887,910.09
  5. Step 5: Solve for x
    x = 2,887,910.09/1,918.69
  6. Step 6: Final answer
    x = 1,505.15

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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.