Home / 1,394.30-2,091.83-420.44

Finding the Fourth Proportional to 1,394.30, 2,091.83 and 420.44

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Solution

The fourth proportional to 1,394.30, 2,091.83 and 420.44 is: 630.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.30 : 2,091.83 = 420.44 : x
  2. Step 2: Convert to fraction form
    1,394.30/2,091.83 = 420.44/x
  3. Step 3: Cross multiply
    1,394.30x = 2,091.83 × 420.44
  4. Step 4: Simplify right side
    1,394.30x = 879,476.44
  5. Step 5: Solve for x
    x = 879,476.44/1,394.30
  6. Step 6: Final answer
    x = 630.76

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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.