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Finding the Fourth Proportional to 3,486.47, 5,232.24 and 1,638.86

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Solution

The fourth proportional to 3,486.47, 5,232.24 and 1,638.86 is: 2,459.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.47 : 5,232.24 = 1,638.86 : x
  2. Step 2: Convert to fraction form
    3,486.47/5,232.24 = 1,638.86/x
  3. Step 3: Cross multiply
    3,486.47x = 5,232.24 × 1,638.86
  4. Step 4: Simplify right side
    3,486.47x = 8,574,876.54
  5. Step 5: Solve for x
    x = 8,574,876.54/3,486.47
  6. Step 6: Final answer
    x = 2,459.48

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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.