Home / 3,115.78-4,299.60-1,858.26

Finding the Fourth Proportional to 3,115.78, 4,299.60 and 1,858.26

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Solution

The fourth proportional to 3,115.78, 4,299.60 and 1,858.26 is: 2,564.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.78 : 4,299.60 = 1,858.26 : x
  2. Step 2: Convert to fraction form
    3,115.78/4,299.60 = 1,858.26/x
  3. Step 3: Cross multiply
    3,115.78x = 4,299.60 × 1,858.26
  4. Step 4: Simplify right side
    3,115.78x = 7,989,774.70
  5. Step 5: Solve for x
    x = 7,989,774.70/3,115.78
  6. Step 6: Final answer
    x = 2,564.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.