Home / 1,941.32-2,911.94-480.45

Finding the Fourth Proportional to 1,941.32, 2,911.94 and 480.45

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Solution

The fourth proportional to 1,941.32, 2,911.94 and 480.45 is: 720.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,941.32 : 2,911.94 = 480.45 : x
  2. Step 2: Convert to fraction form
    1,941.32/2,911.94 = 480.45/x
  3. Step 3: Cross multiply
    1,941.32x = 2,911.94 × 480.45
  4. Step 4: Simplify right side
    1,941.32x = 1,399,041.57
  5. Step 5: Solve for x
    x = 1,399,041.57/1,941.32
  6. Step 6: Final answer
    x = 720.67

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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.