Home / 1,413.54-2,117.07-1,389.78

Finding the Fourth Proportional to 1,413.54, 2,117.07 and 1,389.78

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Solution

The fourth proportional to 1,413.54, 2,117.07 and 1,389.78 is: 2,081.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.54 : 2,117.07 = 1,389.78 : x
  2. Step 2: Convert to fraction form
    1,413.54/2,117.07 = 1,389.78/x
  3. Step 3: Cross multiply
    1,413.54x = 2,117.07 × 1,389.78
  4. Step 4: Simplify right side
    1,413.54x = 2,942,261.54
  5. Step 5: Solve for x
    x = 2,942,261.54/1,413.54
  6. Step 6: Final answer
    x = 2,081.48

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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.