Home / 3,147.25-4,720.89-838.75

Finding the Fourth Proportional to 3,147.25, 4,720.89 and 838.75

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Solution

The fourth proportional to 3,147.25, 4,720.89 and 838.75 is: 1,258.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.25 : 4,720.89 = 838.75 : x
  2. Step 2: Convert to fraction form
    3,147.25/4,720.89 = 838.75/x
  3. Step 3: Cross multiply
    3,147.25x = 4,720.89 × 838.75
  4. Step 4: Simplify right side
    3,147.25x = 3,959,646.49
  5. Step 5: Solve for x
    x = 3,959,646.49/3,147.25
  6. Step 6: Final answer
    x = 1,258.13

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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.