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Finding the Fourth Proportional to 3,153.78, 4,731.75 and 1,422.54

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Solution

The fourth proportional to 3,153.78, 4,731.75 and 1,422.54 is: 2,134.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,153.78 : 4,731.75 = 1,422.54 : x
  2. Step 2: Convert to fraction form
    3,153.78/4,731.75 = 1,422.54/x
  3. Step 3: Cross multiply
    3,153.78x = 4,731.75 × 1,422.54
  4. Step 4: Simplify right side
    3,153.78x = 6,731,103.65
  5. Step 5: Solve for x
    x = 6,731,103.65/3,153.78
  6. Step 6: Final answer
    x = 2,134.30

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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.