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Finding the Fourth Proportional to 2,580.53, 3,871.26 and 939.38

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Solution

The fourth proportional to 2,580.53, 3,871.26 and 939.38 is: 1,409.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.53 : 3,871.26 = 939.38 : x
  2. Step 2: Convert to fraction form
    2,580.53/3,871.26 = 939.38/x
  3. Step 3: Cross multiply
    2,580.53x = 3,871.26 × 939.38
  4. Step 4: Simplify right side
    2,580.53x = 3,636,584.22
  5. Step 5: Solve for x
    x = 3,636,584.22/2,580.53
  6. Step 6: Final answer
    x = 1,409.24

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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.