Home / 1,918.92-2,649.80-1,212.04

Finding the Fourth Proportional to 1,918.92, 2,649.80 and 1,212.04

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Solution

The fourth proportional to 1,918.92, 2,649.80 and 1,212.04 is: 1,673.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.92 : 2,649.80 = 1,212.04 : x
  2. Step 2: Convert to fraction form
    1,918.92/2,649.80 = 1,212.04/x
  3. Step 3: Cross multiply
    1,918.92x = 2,649.80 × 1,212.04
  4. Step 4: Simplify right side
    1,918.92x = 3,211,663.59
  5. Step 5: Solve for x
    x = 3,211,663.59/1,918.92
  6. Step 6: Final answer
    x = 1,673.68

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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.