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Finding the Fourth Proportional to 2,580.90, 3,871.29 and 633.09

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Solution

The fourth proportional to 2,580.90, 3,871.29 and 633.09 is: 949.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.90 : 3,871.29 = 633.09 : x
  2. Step 2: Convert to fraction form
    2,580.90/3,871.29 = 633.09/x
  3. Step 3: Cross multiply
    2,580.90x = 3,871.29 × 633.09
  4. Step 4: Simplify right side
    2,580.90x = 2,450,874.99
  5. Step 5: Solve for x
    x = 2,450,874.99/2,580.90
  6. Step 6: Final answer
    x = 949.62

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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.