Home / 3,977.28-5,488.71-2,405.39

Finding the Fourth Proportional to 3,977.28, 5,488.71 and 2,405.39

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Solution

The fourth proportional to 3,977.28, 5,488.71 and 2,405.39 is: 3,319.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.28 : 5,488.71 = 2,405.39 : x
  2. Step 2: Convert to fraction form
    3,977.28/5,488.71 = 2,405.39/x
  3. Step 3: Cross multiply
    3,977.28x = 5,488.71 × 2,405.39
  4. Step 4: Simplify right side
    3,977.28x = 13,202,460.70
  5. Step 5: Solve for x
    x = 13,202,460.70/3,977.28
  6. Step 6: Final answer
    x = 3,319.47

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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.