Home / 2,918.72-4,379.11-1,821.80

Finding the Fourth Proportional to 2,918.72, 4,379.11 and 1,821.80

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Solution

The fourth proportional to 2,918.72, 4,379.11 and 1,821.80 is: 2,733.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.72 : 4,379.11 = 1,821.80 : x
  2. Step 2: Convert to fraction form
    2,918.72/4,379.11 = 1,821.80/x
  3. Step 3: Cross multiply
    2,918.72x = 4,379.11 × 1,821.80
  4. Step 4: Simplify right side
    2,918.72x = 7,977,868.99
  5. Step 5: Solve for x
    x = 7,977,868.99/2,918.72
  6. Step 6: Final answer
    x = 2,733.34

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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.