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Finding the Fourth Proportional to 3,890.82, 5,836.02 and 1,258.28

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Solution

The fourth proportional to 3,890.82, 5,836.02 and 1,258.28 is: 1,887.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.82 : 5,836.02 = 1,258.28 : x
  2. Step 2: Convert to fraction form
    3,890.82/5,836.02 = 1,258.28/x
  3. Step 3: Cross multiply
    3,890.82x = 5,836.02 × 1,258.28
  4. Step 4: Simplify right side
    3,890.82x = 7,343,318.07
  5. Step 5: Solve for x
    x = 7,343,318.07/3,890.82
  6. Step 6: Final answer
    x = 1,887.34

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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.