Home / 2,173.20-3,261.12-857.64

Finding the Fourth Proportional to 2,173.20, 3,261.12 and 857.64

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Solution

The fourth proportional to 2,173.20, 3,261.12 and 857.64 is: 1,286.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.20 : 3,261.12 = 857.64 : x
  2. Step 2: Convert to fraction form
    2,173.20/3,261.12 = 857.64/x
  3. Step 3: Cross multiply
    2,173.20x = 3,261.12 × 857.64
  4. Step 4: Simplify right side
    2,173.20x = 2,796,866.96
  5. Step 5: Solve for x
    x = 2,796,866.96/2,173.20
  6. Step 6: Final answer
    x = 1,286.98

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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.