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Finding the Fourth Proportional to 2,579, 3,869.70 and 935.86

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Solution

The fourth proportional to 2,579, 3,869.70 and 935.86 is: 1,404.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579 : 3,869.70 = 935.86 : x
  2. Step 2: Convert to fraction form
    2,579/3,869.70 = 935.86/x
  3. Step 3: Cross multiply
    2,579x = 3,869.70 × 935.86
  4. Step 4: Simplify right side
    2,579x = 3,621,497.44
  5. Step 5: Solve for x
    x = 3,621,497.44/2,579
  6. Step 6: Final answer
    x = 1,404.23

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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.