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Finding the Fourth Proportional to 4,172, 5,757.44 and 2,309

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Solution

The fourth proportional to 4,172, 5,757.44 and 2,309 is: 3,186.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,172 : 5,757.44 = 2,309 : x
  2. Step 2: Convert to fraction form
    4,172/5,757.44 = 2,309/x
  3. Step 3: Cross multiply
    4,172x = 5,757.44 × 2,309
  4. Step 4: Simplify right side
    4,172x = 13,293,928.96
  5. Step 5: Solve for x
    x = 13,293,928.96/4,172
  6. Step 6: Final answer
    x = 3,186.46

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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.