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Finding the Fourth Proportional to 3,865.29, 5,798.28 and 1,091.99

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Solution

The fourth proportional to 3,865.29, 5,798.28 and 1,091.99 is: 1,638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.29 : 5,798.28 = 1,091.99 : x
  2. Step 2: Convert to fraction form
    3,865.29/5,798.28 = 1,091.99/x
  3. Step 3: Cross multiply
    3,865.29x = 5,798.28 × 1,091.99
  4. Step 4: Simplify right side
    3,865.29x = 6,331,663.78
  5. Step 5: Solve for x
    x = 6,331,663.78/3,865.29
  6. Step 6: Final answer
    x = 1,638.08

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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.