Home / 3,910.70-5,399.28-3,490.34

Finding the Fourth Proportional to 3,910.70, 5,399.28 and 3,490.34

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Solution

The fourth proportional to 3,910.70, 5,399.28 and 3,490.34 is: 4,818.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.70 : 5,399.28 = 3,490.34 : x
  2. Step 2: Convert to fraction form
    3,910.70/5,399.28 = 3,490.34/x
  3. Step 3: Cross multiply
    3,910.70x = 5,399.28 × 3,490.34
  4. Step 4: Simplify right side
    3,910.70x = 18,845,295.96
  5. Step 5: Solve for x
    x = 18,845,295.96/3,910.70
  6. Step 6: Final answer
    x = 4,818.91

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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.