Home / 3,219.80-4,829.70-1,902.20

Finding the Fourth Proportional to 3,219.80, 4,829.70 and 1,902.20

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Solution

The fourth proportional to 3,219.80, 4,829.70 and 1,902.20 is: 2,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.80 : 4,829.70 = 1,902.20 : x
  2. Step 2: Convert to fraction form
    3,219.80/4,829.70 = 1,902.20/x
  3. Step 3: Cross multiply
    3,219.80x = 4,829.70 × 1,902.20
  4. Step 4: Simplify right side
    3,219.80x = 9,187,055.34
  5. Step 5: Solve for x
    x = 9,187,055.34/3,219.80
  6. Step 6: Final answer
    x = 2,853.30

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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.