Home / 3,638.13-5,455.65-1,138.64

Finding the Fourth Proportional to 3,638.13, 5,455.65 and 1,138.64

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Solution

The fourth proportional to 3,638.13, 5,455.65 and 1,138.64 is: 1,707.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.13 : 5,455.65 = 1,138.64 : x
  2. Step 2: Convert to fraction form
    3,638.13/5,455.65 = 1,138.64/x
  3. Step 3: Cross multiply
    3,638.13x = 5,455.65 × 1,138.64
  4. Step 4: Simplify right side
    3,638.13x = 6,212,052.01
  5. Step 5: Solve for x
    x = 6,212,052.01/3,638.13
  6. Step 6: Final answer
    x = 1,707.49

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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.