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Finding the Fourth Proportional to 3,238, 4,467.72 and 1,911.76

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Solution

The fourth proportional to 3,238, 4,467.72 and 1,911.76 is: 2,637.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,238 : 4,467.72 = 1,911.76 : x
  2. Step 2: Convert to fraction form
    3,238/4,467.72 = 1,911.76/x
  3. Step 3: Cross multiply
    3,238x = 4,467.72 × 1,911.76
  4. Step 4: Simplify right side
    3,238x = 8,541,208.39
  5. Step 5: Solve for x
    x = 8,541,208.39/3,238
  6. Step 6: Final answer
    x = 2,637.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.