Home / 3,458.25-5,187.41-861.18

Finding the Fourth Proportional to 3,458.25, 5,187.41 and 861.18

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Solution

The fourth proportional to 3,458.25, 5,187.41 and 861.18 is: 1,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,458.25 : 5,187.41 = 861.18 : x
  2. Step 2: Convert to fraction form
    3,458.25/5,187.41 = 861.18/x
  3. Step 3: Cross multiply
    3,458.25x = 5,187.41 × 861.18
  4. Step 4: Simplify right side
    3,458.25x = 4,467,289.44
  5. Step 5: Solve for x
    x = 4,467,289.44/3,458.25
  6. Step 6: Final answer
    x = 1,291.78

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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.