Home / 3,970.90-5,479.39-2,457.77

Finding the Fourth Proportional to 3,970.90, 5,479.39 and 2,457.77

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Solution

The fourth proportional to 3,970.90, 5,479.39 and 2,457.77 is: 3,391.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.90 : 5,479.39 = 2,457.77 : x
  2. Step 2: Convert to fraction form
    3,970.90/5,479.39 = 2,457.77/x
  3. Step 3: Cross multiply
    3,970.90x = 5,479.39 × 2,457.77
  4. Step 4: Simplify right side
    3,970.90x = 13,467,052.96
  5. Step 5: Solve for x
    x = 13,467,052.96/3,970.90
  6. Step 6: Final answer
    x = 3,391.44

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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.