Home / 1,394.09-2,091.18-406.87

Finding the Fourth Proportional to 1,394.09, 2,091.18 and 406.87

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Solution

The fourth proportional to 1,394.09, 2,091.18 and 406.87 is: 610.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.09 : 2,091.18 = 406.87 : x
  2. Step 2: Convert to fraction form
    1,394.09/2,091.18 = 406.87/x
  3. Step 3: Cross multiply
    1,394.09x = 2,091.18 × 406.87
  4. Step 4: Simplify right side
    1,394.09x = 850,838.41
  5. Step 5: Solve for x
    x = 850,838.41/1,394.09
  6. Step 6: Final answer
    x = 610.32

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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.