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Finding the Fourth Proportional to 3,638.78, 5,459.24 and 1,173.54

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Solution

The fourth proportional to 3,638.78, 5,459.24 and 1,173.54 is: 1,760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.78 : 5,459.24 = 1,173.54 : x
  2. Step 2: Convert to fraction form
    3,638.78/5,459.24 = 1,173.54/x
  3. Step 3: Cross multiply
    3,638.78x = 5,459.24 × 1,173.54
  4. Step 4: Simplify right side
    3,638.78x = 6,406,636.51
  5. Step 5: Solve for x
    x = 6,406,636.51/3,638.78
  6. Step 6: Final answer
    x = 1,760.66

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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.