Home / 2,157.36-3,236.58-858.42

Finding the Fourth Proportional to 2,157.36, 3,236.58 and 858.42

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Solution

The fourth proportional to 2,157.36, 3,236.58 and 858.42 is: 1,287.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.36 : 3,236.58 = 858.42 : x
  2. Step 2: Convert to fraction form
    2,157.36/3,236.58 = 858.42/x
  3. Step 3: Cross multiply
    2,157.36x = 3,236.58 × 858.42
  4. Step 4: Simplify right side
    2,157.36x = 2,778,345.00
  5. Step 5: Solve for x
    x = 2,778,345.00/2,157.36
  6. Step 6: Final answer
    x = 1,287.84

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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.