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Finding the Fourth Proportional to 4,679.89, 6,453 and 3,188.68

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Solution

The fourth proportional to 4,679.89, 6,453 and 3,188.68 is: 4,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,679.89 : 6,453 = 3,188.68 : x
  2. Step 2: Convert to fraction form
    4,679.89/6,453 = 3,188.68/x
  3. Step 3: Cross multiply
    4,679.89x = 6,453 × 3,188.68
  4. Step 4: Simplify right side
    4,679.89x = 20,576,535.91
  5. Step 5: Solve for x
    x = 20,576,535.91/4,679.89
  6. Step 6: Final answer
    x = 4,396.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.