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Finding the Fourth Proportional to 4,789.70, 7,177.90 and 2,679.42

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Solution

The fourth proportional to 4,789.70, 7,177.90 and 2,679.42 is: 4,015.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,789.70 : 7,177.90 = 2,679.42 : x
  2. Step 2: Convert to fraction form
    4,789.70/7,177.90 = 2,679.42/x
  3. Step 3: Cross multiply
    4,789.70x = 7,177.90 × 2,679.42
  4. Step 4: Simplify right side
    4,789.70x = 19,232,608.82
  5. Step 5: Solve for x
    x = 19,232,608.82/4,789.70
  6. Step 6: Final answer
    x = 4,015.41

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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.