Home / 5,190.50-7,785.68-1,680.60

Finding the Fourth Proportional to 5,190.50, 7,785.68 and 1,680.60

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Solution

The fourth proportional to 5,190.50, 7,785.68 and 1,680.60 is: 2,520.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.50 : 7,785.68 = 1,680.60 : x
  2. Step 2: Convert to fraction form
    5,190.50/7,785.68 = 1,680.60/x
  3. Step 3: Cross multiply
    5,190.50x = 7,785.68 × 1,680.60
  4. Step 4: Simplify right side
    5,190.50x = 13,084,613.81
  5. Step 5: Solve for x
    x = 13,084,613.81/5,190.50
  6. Step 6: Final answer
    x = 2,520.88

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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.