Home / 3,428.40-5,140.86-1,479.72

Finding the Fourth Proportional to 3,428.40, 5,140.86 and 1,479.72

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Solution

The fourth proportional to 3,428.40, 5,140.86 and 1,479.72 is: 2,218.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.40 : 5,140.86 = 1,479.72 : x
  2. Step 2: Convert to fraction form
    3,428.40/5,140.86 = 1,479.72/x
  3. Step 3: Cross multiply
    3,428.40x = 5,140.86 × 1,479.72
  4. Step 4: Simplify right side
    3,428.40x = 7,607,033.36
  5. Step 5: Solve for x
    x = 7,607,033.36/3,428.40
  6. Step 6: Final answer
    x = 2,218.83

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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.