Home / 3,971.28-5,485.80-3,224.40

Finding the Fourth Proportional to 3,971.28, 5,485.80 and 3,224.40

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Solution

The fourth proportional to 3,971.28, 5,485.80 and 3,224.40 is: 4,454.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.28 : 5,485.80 = 3,224.40 : x
  2. Step 2: Convert to fraction form
    3,971.28/5,485.80 = 3,224.40/x
  3. Step 3: Cross multiply
    3,971.28x = 5,485.80 × 3,224.40
  4. Step 4: Simplify right side
    3,971.28x = 17,688,413.52
  5. Step 5: Solve for x
    x = 17,688,413.52/3,971.28
  6. Step 6: Final answer
    x = 4,454.08

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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.