Home / 3,390.78-5,075.34-2,211.36

Finding the Fourth Proportional to 3,390.78, 5,075.34 and 2,211.36

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Solution

The fourth proportional to 3,390.78, 5,075.34 and 2,211.36 is: 3,309.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.78 : 5,075.34 = 2,211.36 : x
  2. Step 2: Convert to fraction form
    3,390.78/5,075.34 = 2,211.36/x
  3. Step 3: Cross multiply
    3,390.78x = 5,075.34 × 2,211.36
  4. Step 4: Simplify right side
    3,390.78x = 11,223,403.86
  5. Step 5: Solve for x
    x = 11,223,403.86/3,390.78
  6. Step 6: Final answer
    x = 3,309.98

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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.