Home / 3,817.90-5,727.30-1,220.50

Finding the Fourth Proportional to 3,817.90, 5,727.30 and 1,220.50

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Solution

The fourth proportional to 3,817.90, 5,727.30 and 1,220.50 is: 1,830.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.90 : 5,727.30 = 1,220.50 : x
  2. Step 2: Convert to fraction form
    3,817.90/5,727.30 = 1,220.50/x
  3. Step 3: Cross multiply
    3,817.90x = 5,727.30 × 1,220.50
  4. Step 4: Simplify right side
    3,817.90x = 6,990,169.65
  5. Step 5: Solve for x
    x = 6,990,169.65/3,817.90
  6. Step 6: Final answer
    x = 1,830.89

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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.