Home / 3,928.32-5,419.08-2,669.40

Finding the Fourth Proportional to 3,928.32, 5,419.08 and 2,669.40

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Solution

The fourth proportional to 3,928.32, 5,419.08 and 2,669.40 is: 3,682.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.32 : 5,419.08 = 2,669.40 : x
  2. Step 2: Convert to fraction form
    3,928.32/5,419.08 = 2,669.40/x
  3. Step 3: Cross multiply
    3,928.32x = 5,419.08 × 2,669.40
  4. Step 4: Simplify right side
    3,928.32x = 14,465,692.15
  5. Step 5: Solve for x
    x = 14,465,692.15/3,928.32
  6. Step 6: Final answer
    x = 3,682.41

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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.