Home / 5,419.30-7,478.58-3,180.78

Finding the Fourth Proportional to 5,419.30, 7,478.58 and 3,180.78

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Solution

The fourth proportional to 5,419.30, 7,478.58 and 3,180.78 is: 4,389.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.30 : 7,478.58 = 3,180.78 : x
  2. Step 2: Convert to fraction form
    5,419.30/7,478.58 = 3,180.78/x
  3. Step 3: Cross multiply
    5,419.30x = 7,478.58 × 3,180.78
  4. Step 4: Simplify right side
    5,419.30x = 23,787,717.69
  5. Step 5: Solve for x
    x = 23,787,717.69/5,419.30
  6. Step 6: Final answer
    x = 4,389.44

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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.