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Finding the Fourth Proportional to 4,891.80, 7,325.55 and 3,919.80

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Solution

The fourth proportional to 4,891.80, 7,325.55 and 3,919.80 is: 5,869.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.80 : 7,325.55 = 3,919.80 : x
  2. Step 2: Convert to fraction form
    4,891.80/7,325.55 = 3,919.80/x
  3. Step 3: Cross multiply
    4,891.80x = 7,325.55 × 3,919.80
  4. Step 4: Simplify right side
    4,891.80x = 28,714,690.89
  5. Step 5: Solve for x
    x = 28,714,690.89/4,891.80
  6. Step 6: Final answer
    x = 5,869.96

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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.