Home / 3,905.40-5,389.24-2,226.60

Finding the Fourth Proportional to 3,905.40, 5,389.24 and 2,226.60

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Solution

The fourth proportional to 3,905.40, 5,389.24 and 2,226.60 is: 3,072.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.40 : 5,389.24 = 2,226.60 : x
  2. Step 2: Convert to fraction form
    3,905.40/5,389.24 = 2,226.60/x
  3. Step 3: Cross multiply
    3,905.40x = 5,389.24 × 2,226.60
  4. Step 4: Simplify right side
    3,905.40x = 11,999,681.78
  5. Step 5: Solve for x
    x = 11,999,681.78/3,905.40
  6. Step 6: Final answer
    x = 3,072.59

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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.