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Finding the Fourth Proportional to 3,428.78, 5,143.17 and 1,237.48

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Solution

The fourth proportional to 3,428.78, 5,143.17 and 1,237.48 is: 1,856.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.78 : 5,143.17 = 1,237.48 : x
  2. Step 2: Convert to fraction form
    3,428.78/5,143.17 = 1,237.48/x
  3. Step 3: Cross multiply
    3,428.78x = 5,143.17 × 1,237.48
  4. Step 4: Simplify right side
    3,428.78x = 6,364,544.30
  5. Step 5: Solve for x
    x = 6,364,544.30/3,428.78
  6. Step 6: Final answer
    x = 1,856.21

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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.