Home / 3,880.80-5,356.79-2,287.40

Finding the Fourth Proportional to 3,880.80, 5,356.79 and 2,287.40

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Solution

The fourth proportional to 3,880.80, 5,356.79 and 2,287.40 is: 3,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,880.80 : 5,356.79 = 2,287.40 : x
  2. Step 2: Convert to fraction form
    3,880.80/5,356.79 = 2,287.40/x
  3. Step 3: Cross multiply
    3,880.80x = 5,356.79 × 2,287.40
  4. Step 4: Simplify right side
    3,880.80x = 12,253,083.23
  5. Step 5: Solve for x
    x = 12,253,083.23/3,880.80
  6. Step 6: Final answer
    x = 3,157.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.