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Finding the Fourth Proportional to 3,965.22, 5,918.76 and 3,672

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Solution

The fourth proportional to 3,965.22, 5,918.76 and 3,672 is: 5,481.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.22 : 5,918.76 = 3,672 : x
  2. Step 2: Convert to fraction form
    3,965.22/5,918.76 = 3,672/x
  3. Step 3: Cross multiply
    3,965.22x = 5,918.76 × 3,672
  4. Step 4: Simplify right side
    3,965.22x = 21,733,686.72
  5. Step 5: Solve for x
    x = 21,733,686.72/3,965.22
  6. Step 6: Final answer
    x = 5,481.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.