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Finding the Fourth Proportional to 3,381, 5,072.14 and 1,557

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Solution

The fourth proportional to 3,381, 5,072.14 and 1,557 is: 2,335.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381 : 5,072.14 = 1,557 : x
  2. Step 2: Convert to fraction form
    3,381/5,072.14 = 1,557/x
  3. Step 3: Cross multiply
    3,381x = 5,072.14 × 1,557
  4. Step 4: Simplify right side
    3,381x = 7,897,321.98
  5. Step 5: Solve for x
    x = 7,897,321.98/3,381
  6. Step 6: Final answer
    x = 2,335.79

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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.