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Finding the Fourth Proportional to 4,620.89, 6,931.23 and 3,136.41

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Solution

The fourth proportional to 4,620.89, 6,931.23 and 3,136.41 is: 4,704.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,620.89 : 6,931.23 = 3,136.41 : x
  2. Step 2: Convert to fraction form
    4,620.89/6,931.23 = 3,136.41/x
  3. Step 3: Cross multiply
    4,620.89x = 6,931.23 × 3,136.41
  4. Step 4: Simplify right side
    4,620.89x = 21,739,179.63
  5. Step 5: Solve for x
    x = 21,739,179.63/4,620.89
  6. Step 6: Final answer
    x = 4,704.54

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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.