Home / 3,420.80-5,131.74-1,230.32

Finding the Fourth Proportional to 3,420.80, 5,131.74 and 1,230.32

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Solution

The fourth proportional to 3,420.80, 5,131.74 and 1,230.32 is: 1,845.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.80 : 5,131.74 = 1,230.32 : x
  2. Step 2: Convert to fraction form
    3,420.80/5,131.74 = 1,230.32/x
  3. Step 3: Cross multiply
    3,420.80x = 5,131.74 × 1,230.32
  4. Step 4: Simplify right side
    3,420.80x = 6,313,682.36
  5. Step 5: Solve for x
    x = 6,313,682.36/3,420.80
  6. Step 6: Final answer
    x = 1,845.67

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1.5x scale

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.