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Finding the Fourth Proportional to 3,805.81, 5,707.78 and 1,306.71

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Solution

The fourth proportional to 3,805.81, 5,707.78 and 1,306.71 is: 1,959.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,805.81 : 5,707.78 = 1,306.71 : x
  2. Step 2: Convert to fraction form
    3,805.81/5,707.78 = 1,306.71/x
  3. Step 3: Cross multiply
    3,805.81x = 5,707.78 × 1,306.71
  4. Step 4: Simplify right side
    3,805.81x = 7,458,409.94
  5. Step 5: Solve for x
    x = 7,458,409.94/3,805.81
  6. Step 6: Final answer
    x = 1,959.74

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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.