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Finding the Fourth Proportional to 2,558.80, 3,834.75 and 913.79

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Solution

The fourth proportional to 2,558.80, 3,834.75 and 913.79 is: 1,369.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,558.80 : 3,834.75 = 913.79 : x
  2. Step 2: Convert to fraction form
    2,558.80/3,834.75 = 913.79/x
  3. Step 3: Cross multiply
    2,558.80x = 3,834.75 × 913.79
  4. Step 4: Simplify right side
    2,558.80x = 3,504,165.79
  5. Step 5: Solve for x
    x = 3,504,165.79/2,558.80
  6. Step 6: Final answer
    x = 1,369.46

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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.