Home / 5,190.91-7,784.69-1,680.17

Finding the Fourth Proportional to 5,190.91, 7,784.69 and 1,680.17

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Solution

The fourth proportional to 5,190.91, 7,784.69 and 1,680.17 is: 2,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.91 : 7,784.69 = 1,680.17 : x
  2. Step 2: Convert to fraction form
    5,190.91/7,784.69 = 1,680.17/x
  3. Step 3: Cross multiply
    5,190.91x = 7,784.69 × 1,680.17
  4. Step 4: Simplify right side
    5,190.91x = 13,079,555.27
  5. Step 5: Solve for x
    x = 13,079,555.27/5,190.91
  6. Step 6: Final answer
    x = 2,519.70

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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.