Home / 3,970.45-5,478.99-2,398.24

Finding the Fourth Proportional to 3,970.45, 5,478.99 and 2,398.24

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Solution

The fourth proportional to 3,970.45, 5,478.99 and 2,398.24 is: 3,309.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.45 : 5,478.99 = 2,398.24 : x
  2. Step 2: Convert to fraction form
    3,970.45/5,478.99 = 2,398.24/x
  3. Step 3: Cross multiply
    3,970.45x = 5,478.99 × 2,398.24
  4. Step 4: Simplify right side
    3,970.45x = 13,139,932.98
  5. Step 5: Solve for x
    x = 13,139,932.98/3,970.45
  6. Step 6: Final answer
    x = 3,309.43

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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.