Home / 3,128.85-4,318.20-1,802.67

Finding the Fourth Proportional to 3,128.85, 4,318.20 and 1,802.67

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Solution

The fourth proportional to 3,128.85, 4,318.20 and 1,802.67 is: 2,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.85 : 4,318.20 = 1,802.67 : x
  2. Step 2: Convert to fraction form
    3,128.85/4,318.20 = 1,802.67/x
  3. Step 3: Cross multiply
    3,128.85x = 4,318.20 × 1,802.67
  4. Step 4: Simplify right side
    3,128.85x = 7,784,289.59
  5. Step 5: Solve for x
    x = 7,784,289.59/3,128.85
  6. Step 6: Final answer
    x = 2,487.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.