Home / 3,977.40-5,488.80-2,405.04

Finding the Fourth Proportional to 3,977.40, 5,488.80 and 2,405.04

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Solution

The fourth proportional to 3,977.40, 5,488.80 and 2,405.04 is: 3,318.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.40 : 5,488.80 = 2,405.04 : x
  2. Step 2: Convert to fraction form
    3,977.40/5,488.80 = 2,405.04/x
  3. Step 3: Cross multiply
    3,977.40x = 5,488.80 × 2,405.04
  4. Step 4: Simplify right side
    3,977.40x = 13,200,783.55
  5. Step 5: Solve for x
    x = 13,200,783.55/3,977.40
  6. Step 6: Final answer
    x = 3,318.95

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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.