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Finding the Fourth Proportional to 3,930.81, 5,895.74 and 1,157.51

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Solution

The fourth proportional to 3,930.81, 5,895.74 and 1,157.51 is: 1,736.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.81 : 5,895.74 = 1,157.51 : x
  2. Step 2: Convert to fraction form
    3,930.81/5,895.74 = 1,157.51/x
  3. Step 3: Cross multiply
    3,930.81x = 5,895.74 × 1,157.51
  4. Step 4: Simplify right side
    3,930.81x = 6,824,378.01
  5. Step 5: Solve for x
    x = 6,824,378.01/3,930.81
  6. Step 6: Final answer
    x = 1,736.13

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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.