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Finding the Fourth Proportional to 3,387.83, 5,080.12 and 1,438.97

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Solution

The fourth proportional to 3,387.83, 5,080.12 and 1,438.97 is: 2,157.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.83 : 5,080.12 = 1,438.97 : x
  2. Step 2: Convert to fraction form
    3,387.83/5,080.12 = 1,438.97/x
  3. Step 3: Cross multiply
    3,387.83x = 5,080.12 × 1,438.97
  4. Step 4: Simplify right side
    3,387.83x = 7,310,140.28
  5. Step 5: Solve for x
    x = 7,310,140.28/3,387.83
  6. Step 6: Final answer
    x = 2,157.76

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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.