Home / 5,210.80-7,816.20-3,239.60

Finding the Fourth Proportional to 5,210.80, 7,816.20 and 3,239.60

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Solution

The fourth proportional to 5,210.80, 7,816.20 and 3,239.60 is: 4,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,210.80 : 7,816.20 = 3,239.60 : x
  2. Step 2: Convert to fraction form
    5,210.80/7,816.20 = 3,239.60/x
  3. Step 3: Cross multiply
    5,210.80x = 7,816.20 × 3,239.60
  4. Step 4: Simplify right side
    5,210.80x = 25,321,361.52
  5. Step 5: Solve for x
    x = 25,321,361.52/5,210.80
  6. Step 6: Final answer
    x = 4,859.40

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Similar ratio
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1.5x scale

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.