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Finding the Fourth Proportional to 3,812.81, 5,718.63 and 1,039.71

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Solution

The fourth proportional to 3,812.81, 5,718.63 and 1,039.71 is: 1,559.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.81 : 5,718.63 = 1,039.71 : x
  2. Step 2: Convert to fraction form
    3,812.81/5,718.63 = 1,039.71/x
  3. Step 3: Cross multiply
    3,812.81x = 5,718.63 × 1,039.71
  4. Step 4: Simplify right side
    3,812.81x = 5,945,690.80
  5. Step 5: Solve for x
    x = 5,945,690.80/3,812.81
  6. Step 6: Final answer
    x = 1,559.40

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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.