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Finding the Fourth Proportional to 2,569.79, 3,855.09 and 838.01

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Solution

The fourth proportional to 2,569.79, 3,855.09 and 838.01 is: 1,257.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.79 : 3,855.09 = 838.01 : x
  2. Step 2: Convert to fraction form
    2,569.79/3,855.09 = 838.01/x
  3. Step 3: Cross multiply
    2,569.79x = 3,855.09 × 838.01
  4. Step 4: Simplify right side
    2,569.79x = 3,230,599.78
  5. Step 5: Solve for x
    x = 3,230,599.78/2,569.79
  6. Step 6: Final answer
    x = 1,257.15

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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.