Home / 1,413.85-2,120.22-426.36

Finding the Fourth Proportional to 1,413.85, 2,120.22 and 426.36

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Solution

The fourth proportional to 1,413.85, 2,120.22 and 426.36 is: 639.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.85 : 2,120.22 = 426.36 : x
  2. Step 2: Convert to fraction form
    1,413.85/2,120.22 = 426.36/x
  3. Step 3: Cross multiply
    1,413.85x = 2,120.22 × 426.36
  4. Step 4: Simplify right side
    1,413.85x = 903,974.87
  5. Step 5: Solve for x
    x = 903,974.87/1,413.85
  6. Step 6: Final answer
    x = 639.37

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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.