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Finding the Fourth Proportional to 2,579.93, 3,871.43 and 936.61

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Solution

The fourth proportional to 2,579.93, 3,871.43 and 936.61 is: 1,405.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.93 : 3,871.43 = 936.61 : x
  2. Step 2: Convert to fraction form
    2,579.93/3,871.43 = 936.61/x
  3. Step 3: Cross multiply
    2,579.93x = 3,871.43 × 936.61
  4. Step 4: Simplify right side
    2,579.93x = 3,626,000.70
  5. Step 5: Solve for x
    x = 3,626,000.70/2,579.93
  6. Step 6: Final answer
    x = 1,405.46

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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.