Home / 2,171.12-3,256.80-611.25

Finding the Fourth Proportional to 2,171.12, 3,256.80 and 611.25

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Solution

The fourth proportional to 2,171.12, 3,256.80 and 611.25 is: 916.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.12 : 3,256.80 = 611.25 : x
  2. Step 2: Convert to fraction form
    2,171.12/3,256.80 = 611.25/x
  3. Step 3: Cross multiply
    2,171.12x = 3,256.80 × 611.25
  4. Step 4: Simplify right side
    2,171.12x = 1,990,719
  5. Step 5: Solve for x
    x = 1,990,719/2,171.12
  6. Step 6: Final answer
    x = 916.91

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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.