Home / 1,918.43-2,647.49-1,122.26

Finding the Fourth Proportional to 1,918.43, 2,647.49 and 1,122.26

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Solution

The fourth proportional to 1,918.43, 2,647.49 and 1,122.26 is: 1,548.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.43 : 2,647.49 = 1,122.26 : x
  2. Step 2: Convert to fraction form
    1,918.43/2,647.49 = 1,122.26/x
  3. Step 3: Cross multiply
    1,918.43x = 2,647.49 × 1,122.26
  4. Step 4: Simplify right side
    1,918.43x = 2,971,153.28
  5. Step 5: Solve for x
    x = 2,971,153.28/1,918.43
  6. Step 6: Final answer
    x = 1,548.74

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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.