Home / 3,218.81-4,442.03-1,821.56

Finding the Fourth Proportional to 3,218.81, 4,442.03 and 1,821.56

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Solution

The fourth proportional to 3,218.81, 4,442.03 and 1,821.56 is: 2,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.81 : 4,442.03 = 1,821.56 : x
  2. Step 2: Convert to fraction form
    3,218.81/4,442.03 = 1,821.56/x
  3. Step 3: Cross multiply
    3,218.81x = 4,442.03 × 1,821.56
  4. Step 4: Simplify right side
    3,218.81x = 8,091,439.83
  5. Step 5: Solve for x
    x = 8,091,439.83/3,218.81
  6. Step 6: Final answer
    x = 2,513.80

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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.