Home / 2,160.60-2,980.05-1,413.36

Finding the Fourth Proportional to 2,160.60, 2,980.05 and 1,413.36

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Solution

The fourth proportional to 2,160.60, 2,980.05 and 1,413.36 is: 1,949.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.60 : 2,980.05 = 1,413.36 : x
  2. Step 2: Convert to fraction form
    2,160.60/2,980.05 = 1,413.36/x
  3. Step 3: Cross multiply
    2,160.60x = 2,980.05 × 1,413.36
  4. Step 4: Simplify right side
    2,160.60x = 4,211,883.47
  5. Step 5: Solve for x
    x = 4,211,883.47/2,160.60
  6. Step 6: Final answer
    x = 1,949.40

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1.5x scale

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.