Home / 3,387.21-5,079.59-1,438.75

Finding the Fourth Proportional to 3,387.21, 5,079.59 and 1,438.75

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Solution

The fourth proportional to 3,387.21, 5,079.59 and 1,438.75 is: 2,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.21 : 5,079.59 = 1,438.75 : x
  2. Step 2: Convert to fraction form
    3,387.21/5,079.59 = 1,438.75/x
  3. Step 3: Cross multiply
    3,387.21x = 5,079.59 × 1,438.75
  4. Step 4: Simplify right side
    3,387.21x = 7,308,260.11
  5. Step 5: Solve for x
    x = 7,308,260.11/3,387.21
  6. Step 6: Final answer
    x = 2,157.60

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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.