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Finding the Fourth Proportional to 5,079.78, 7,621.94 and 3,230.40

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Solution

The fourth proportional to 5,079.78, 7,621.94 and 3,230.40 is: 4,847.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.78 : 7,621.94 = 3,230.40 : x
  2. Step 2: Convert to fraction form
    5,079.78/7,621.94 = 3,230.40/x
  3. Step 3: Cross multiply
    5,079.78x = 7,621.94 × 3,230.40
  4. Step 4: Simplify right side
    5,079.78x = 24,621,898.82
  5. Step 5: Solve for x
    x = 24,621,898.82/5,079.78
  6. Step 6: Final answer
    x = 4,847.04

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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.