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Finding the Fourth Proportional to 4,118.80, 6,178.20 and 3,917.20

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Solution

The fourth proportional to 4,118.80, 6,178.20 and 3,917.20 is: 5,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,118.80 : 6,178.20 = 3,917.20 : x
  2. Step 2: Convert to fraction form
    4,118.80/6,178.20 = 3,917.20/x
  3. Step 3: Cross multiply
    4,118.80x = 6,178.20 × 3,917.20
  4. Step 4: Simplify right side
    4,118.80x = 24,201,245.04
  5. Step 5: Solve for x
    x = 24,201,245.04/4,118.80
  6. Step 6: Final answer
    x = 5,875.80

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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.