Home / 3,858.20-5,787.30-1,261.40

Finding the Fourth Proportional to 3,858.20, 5,787.30 and 1,261.40

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Solution

The fourth proportional to 3,858.20, 5,787.30 and 1,261.40 is: 1,892.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.20 : 5,787.30 = 1,261.40 : x
  2. Step 2: Convert to fraction form
    3,858.20/5,787.30 = 1,261.40/x
  3. Step 3: Cross multiply
    3,858.20x = 5,787.30 × 1,261.40
  4. Step 4: Simplify right side
    3,858.20x = 7,300,100.22
  5. Step 5: Solve for x
    x = 7,300,100.22/3,858.20
  6. Step 6: Final answer
    x = 1,892.10

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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.