Home / 3,479.28-5,219.64-1,139.64

Finding the Fourth Proportional to 3,479.28, 5,219.64 and 1,139.64

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Solution

The fourth proportional to 3,479.28, 5,219.64 and 1,139.64 is: 1,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.28 : 5,219.64 = 1,139.64 : x
  2. Step 2: Convert to fraction form
    3,479.28/5,219.64 = 1,139.64/x
  3. Step 3: Cross multiply
    3,479.28x = 5,219.64 × 1,139.64
  4. Step 4: Simplify right side
    3,479.28x = 5,948,510.53
  5. Step 5: Solve for x
    x = 5,948,510.53/3,479.28
  6. Step 6: Final answer
    x = 1,709.70

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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.