Home / 3,428.70-5,140.35-1,479.30

Finding the Fourth Proportional to 3,428.70, 5,140.35 and 1,479.30

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Solution

The fourth proportional to 3,428.70, 5,140.35 and 1,479.30 is: 2,217.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.70 : 5,140.35 = 1,479.30 : x
  2. Step 2: Convert to fraction form
    3,428.70/5,140.35 = 1,479.30/x
  3. Step 3: Cross multiply
    3,428.70x = 5,140.35 × 1,479.30
  4. Step 4: Simplify right side
    3,428.70x = 7,604,119.76
  5. Step 5: Solve for x
    x = 7,604,119.76/3,428.70
  6. Step 6: Final answer
    x = 2,217.79

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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.