Home / 3,977.15-5,490.99-2,720.30

Finding the Fourth Proportional to 3,977.15, 5,490.99 and 2,720.30

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Solution

The fourth proportional to 3,977.15, 5,490.99 and 2,720.30 is: 3,755.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.15 : 5,490.99 = 2,720.30 : x
  2. Step 2: Convert to fraction form
    3,977.15/5,490.99 = 2,720.30/x
  3. Step 3: Cross multiply
    3,977.15x = 5,490.99 × 2,720.30
  4. Step 4: Simplify right side
    3,977.15x = 14,937,112.64
  5. Step 5: Solve for x
    x = 14,937,112.64/3,977.15
  6. Step 6: Final answer
    x = 3,755.74

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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.