Home / 3,905.28-5,379.84-2,661.12

Finding the Fourth Proportional to 3,905.28, 5,379.84 and 2,661.12

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Solution

The fourth proportional to 3,905.28, 5,379.84 and 2,661.12 is: 3,665.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.28 : 5,379.84 = 2,661.12 : x
  2. Step 2: Convert to fraction form
    3,905.28/5,379.84 = 2,661.12/x
  3. Step 3: Cross multiply
    3,905.28x = 5,379.84 × 2,661.12
  4. Step 4: Simplify right side
    3,905.28x = 14,316,399.82
  5. Step 5: Solve for x
    x = 14,316,399.82/3,905.28
  6. Step 6: Final answer
    x = 3,665.91

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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.