Home / 3,320.12-4,980.63-1,128.26

Finding the Fourth Proportional to 3,320.12, 4,980.63 and 1,128.26

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Solution

The fourth proportional to 3,320.12, 4,980.63 and 1,128.26 is: 1,692.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.12 : 4,980.63 = 1,128.26 : x
  2. Step 2: Convert to fraction form
    3,320.12/4,980.63 = 1,128.26/x
  3. Step 3: Cross multiply
    3,320.12x = 4,980.63 × 1,128.26
  4. Step 4: Simplify right side
    3,320.12x = 5,619,420.70
  5. Step 5: Solve for x
    x = 5,619,420.70/3,320.12
  6. Step 6: Final answer
    x = 1,692.54

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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.