Home / 3,977.55-5,490.32-2,798.91

Finding the Fourth Proportional to 3,977.55, 5,490.32 and 2,798.91

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Solution

The fourth proportional to 3,977.55, 5,490.32 and 2,798.91 is: 3,863.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.55 : 5,490.32 = 2,798.91 : x
  2. Step 2: Convert to fraction form
    3,977.55/5,490.32 = 2,798.91/x
  3. Step 3: Cross multiply
    3,977.55x = 5,490.32 × 2,798.91
  4. Step 4: Simplify right side
    3,977.55x = 15,366,897.56
  5. Step 5: Solve for x
    x = 15,366,897.56/3,977.55
  6. Step 6: Final answer
    x = 3,863.41

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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.