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Finding the Fourth Proportional to 3,805.96, 5,708.86 and 1,208.68

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Solution

The fourth proportional to 3,805.96, 5,708.86 and 1,208.68 is: 1,812.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,805.96 : 5,708.86 = 1,208.68 : x
  2. Step 2: Convert to fraction form
    3,805.96/5,708.86 = 1,208.68/x
  3. Step 3: Cross multiply
    3,805.96x = 5,708.86 × 1,208.68
  4. Step 4: Simplify right side
    3,805.96x = 6,900,184.90
  5. Step 5: Solve for x
    x = 6,900,184.90/3,805.96
  6. Step 6: Final answer
    x = 1,812.99

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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.