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Finding the Fourth Proportional to 2,658.35, 3,986.68 and 879.08

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Solution

The fourth proportional to 2,658.35, 3,986.68 and 879.08 is: 1,318.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.35 : 3,986.68 = 879.08 : x
  2. Step 2: Convert to fraction form
    2,658.35/3,986.68 = 879.08/x
  3. Step 3: Cross multiply
    2,658.35x = 3,986.68 × 879.08
  4. Step 4: Simplify right side
    2,658.35x = 3,504,618.42
  5. Step 5: Solve for x
    x = 3,504,618.42/2,658.35
  6. Step 6: Final answer
    x = 1,318.34

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1.5x scale

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.