Home / 3,949.20-5,938.20-3,315.60

Finding the Fourth Proportional to 3,949.20, 5,938.20 and 3,315.60

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Solution

The fourth proportional to 3,949.20, 5,938.20 and 3,315.60 is: 4,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.20 : 5,938.20 = 3,315.60 : x
  2. Step 2: Convert to fraction form
    3,949.20/5,938.20 = 3,315.60/x
  3. Step 3: Cross multiply
    3,949.20x = 5,938.20 × 3,315.60
  4. Step 4: Simplify right side
    3,949.20x = 19,688,695.92
  5. Step 5: Solve for x
    x = 19,688,695.92/3,949.20
  6. Step 6: Final answer
    x = 4,985.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.