Home / 1,394.25-2,091.70-407.09

Finding the Fourth Proportional to 1,394.25, 2,091.70 and 407.09

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Solution

The fourth proportional to 1,394.25, 2,091.70 and 407.09 is: 610.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.25 : 2,091.70 = 407.09 : x
  2. Step 2: Convert to fraction form
    1,394.25/2,091.70 = 407.09/x
  3. Step 3: Cross multiply
    1,394.25x = 2,091.70 × 407.09
  4. Step 4: Simplify right side
    1,394.25x = 851,514.36
  5. Step 5: Solve for x
    x = 851,514.36/1,394.25
  6. Step 6: Final answer
    x = 610.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.