Home / 1,619.73-2,230.80-1,398.60

Finding the Fourth Proportional to 1,619.73, 2,230.80 and 1,398.60

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Solution

The fourth proportional to 1,619.73, 2,230.80 and 1,398.60 is: 1,926.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.73 : 2,230.80 = 1,398.60 : x
  2. Step 2: Convert to fraction form
    1,619.73/2,230.80 = 1,398.60/x
  3. Step 3: Cross multiply
    1,619.73x = 2,230.80 × 1,398.60
  4. Step 4: Simplify right side
    1,619.73x = 3,119,996.88
  5. Step 5: Solve for x
    x = 3,119,996.88/1,619.73
  6. Step 6: Final answer
    x = 1,926.25

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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.