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Finding the Fourth Proportional to 4,855.80, 7,280.10 and 2,080.20

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Solution

The fourth proportional to 4,855.80, 7,280.10 and 2,080.20 is: 3,118.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,855.80 : 7,280.10 = 2,080.20 : x
  2. Step 2: Convert to fraction form
    4,855.80/7,280.10 = 2,080.20/x
  3. Step 3: Cross multiply
    4,855.80x = 7,280.10 × 2,080.20
  4. Step 4: Simplify right side
    4,855.80x = 15,144,064.02
  5. Step 5: Solve for x
    x = 15,144,064.02/4,855.80
  6. Step 6: Final answer
    x = 3,118.76

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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.