Home / 3,918.40-5,406.98-2,240.24

Finding the Fourth Proportional to 3,918.40, 5,406.98 and 2,240.24

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Solution

The fourth proportional to 3,918.40, 5,406.98 and 2,240.24 is: 3,091.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.40 : 5,406.98 = 2,240.24 : x
  2. Step 2: Convert to fraction form
    3,918.40/5,406.98 = 2,240.24/x
  3. Step 3: Cross multiply
    3,918.40x = 5,406.98 × 2,240.24
  4. Step 4: Simplify right side
    3,918.40x = 12,112,932.88
  5. Step 5: Solve for x
    x = 12,112,932.88/3,918.40
  6. Step 6: Final answer
    x = 3,091.30

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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.