Home / 3,817.20-5,725.80-1,220.16

Finding the Fourth Proportional to 3,817.20, 5,725.80 and 1,220.16

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Solution

The fourth proportional to 3,817.20, 5,725.80 and 1,220.16 is: 1,830.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.20 : 5,725.80 = 1,220.16 : x
  2. Step 2: Convert to fraction form
    3,817.20/5,725.80 = 1,220.16/x
  3. Step 3: Cross multiply
    3,817.20x = 5,725.80 × 1,220.16
  4. Step 4: Simplify right side
    3,817.20x = 6,986,392.13
  5. Step 5: Solve for x
    x = 6,986,392.13/3,817.20
  6. Step 6: Final answer
    x = 1,830.24

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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.