Home / 2,160.20-2,979.12-1,413.92

Finding the Fourth Proportional to 2,160.20, 2,979.12 and 1,413.92

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Solution

The fourth proportional to 2,160.20, 2,979.12 and 1,413.92 is: 1,949.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.20 : 2,979.12 = 1,413.92 : x
  2. Step 2: Convert to fraction form
    2,160.20/2,979.12 = 1,413.92/x
  3. Step 3: Cross multiply
    2,160.20x = 2,979.12 × 1,413.92
  4. Step 4: Simplify right side
    2,160.20x = 4,212,237.35
  5. Step 5: Solve for x
    x = 4,212,237.35/2,160.20
  6. Step 6: Final answer
    x = 1,949.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.