Home / 3,977.69-5,488.34-2,405.75

Finding the Fourth Proportional to 3,977.69, 5,488.34 and 2,405.75

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Solution

The fourth proportional to 3,977.69, 5,488.34 and 2,405.75 is: 3,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.69 : 5,488.34 = 2,405.75 : x
  2. Step 2: Convert to fraction form
    3,977.69/5,488.34 = 2,405.75/x
  3. Step 3: Cross multiply
    3,977.69x = 5,488.34 × 2,405.75
  4. Step 4: Simplify right side
    3,977.69x = 13,203,534.48
  5. Step 5: Solve for x
    x = 13,203,534.48/3,977.69
  6. Step 6: Final answer
    x = 3,319.40

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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.