Home / 3,908.64-5,390.28-2,490.85

Finding the Fourth Proportional to 3,908.64, 5,390.28 and 2,490.85

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Solution

The fourth proportional to 3,908.64, 5,390.28 and 2,490.85 is: 3,435.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.64 : 5,390.28 = 2,490.85 : x
  2. Step 2: Convert to fraction form
    3,908.64/5,390.28 = 2,490.85/x
  3. Step 3: Cross multiply
    3,908.64x = 5,390.28 × 2,490.85
  4. Step 4: Simplify right side
    3,908.64x = 13,426,353.01
  5. Step 5: Solve for x
    x = 13,426,353.01/3,908.64
  6. Step 6: Final answer
    x = 3,435.04

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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.