Home / 1,637.20-2,257.82-1,218.60

Finding the Fourth Proportional to 1,637.20, 2,257.82 and 1,218.60

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Solution

The fourth proportional to 1,637.20, 2,257.82 and 1,218.60 is: 1,680.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.20 : 2,257.82 = 1,218.60 : x
  2. Step 2: Convert to fraction form
    1,637.20/2,257.82 = 1,218.60/x
  3. Step 3: Cross multiply
    1,637.20x = 2,257.82 × 1,218.60
  4. Step 4: Simplify right side
    1,637.20x = 2,751,379.45
  5. Step 5: Solve for x
    x = 2,751,379.45/1,637.20
  6. Step 6: Final answer
    x = 1,680.54

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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.