Home / 3,905.25-5,391.02-2,490.87

Finding the Fourth Proportional to 3,905.25, 5,391.02 and 2,490.87

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Solution

The fourth proportional to 3,905.25, 5,391.02 and 2,490.87 is: 3,438.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.25 : 5,391.02 = 2,490.87 : x
  2. Step 2: Convert to fraction form
    3,905.25/5,391.02 = 2,490.87/x
  3. Step 3: Cross multiply
    3,905.25x = 5,391.02 × 2,490.87
  4. Step 4: Simplify right side
    3,905.25x = 13,428,349.43
  5. Step 5: Solve for x
    x = 13,428,349.43/3,905.25
  6. Step 6: Final answer
    x = 3,438.54

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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.