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Finding the Fourth Proportional to 2,610.68, 3,916.62 and 855.68

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Solution

The fourth proportional to 2,610.68, 3,916.62 and 855.68 is: 1,283.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,610.68 : 3,916.62 = 855.68 : x
  2. Step 2: Convert to fraction form
    2,610.68/3,916.62 = 855.68/x
  3. Step 3: Cross multiply
    2,610.68x = 3,916.62 × 855.68
  4. Step 4: Simplify right side
    2,610.68x = 3,351,353.82
  5. Step 5: Solve for x
    x = 3,351,353.82/2,610.68
  6. Step 6: Final answer
    x = 1,283.71

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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.