Home / 1,413.27-2,121.98-1,388.36

Finding the Fourth Proportional to 1,413.27, 2,121.98 and 1,388.36

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Solution

The fourth proportional to 1,413.27, 2,121.98 and 1,388.36 is: 2,084.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.27 : 2,121.98 = 1,388.36 : x
  2. Step 2: Convert to fraction form
    1,413.27/2,121.98 = 1,388.36/x
  3. Step 3: Cross multiply
    1,413.27x = 2,121.98 × 1,388.36
  4. Step 4: Simplify right side
    1,413.27x = 2,946,066.39
  5. Step 5: Solve for x
    x = 2,946,066.39/1,413.27
  6. Step 6: Final answer
    x = 2,084.57

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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.