Home / 1,394.16-2,091.11-420.27

Finding the Fourth Proportional to 1,394.16, 2,091.11 and 420.27

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Solution

The fourth proportional to 1,394.16, 2,091.11 and 420.27 is: 630.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.16 : 2,091.11 = 420.27 : x
  2. Step 2: Convert to fraction form
    1,394.16/2,091.11 = 420.27/x
  3. Step 3: Cross multiply
    1,394.16x = 2,091.11 × 420.27
  4. Step 4: Simplify right side
    1,394.16x = 878,828.70
  5. Step 5: Solve for x
    x = 878,828.70/1,394.16
  6. Step 6: Final answer
    x = 630.36

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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.