Home / 3,479.85-5,220.91-1,288.74

Finding the Fourth Proportional to 3,479.85, 5,220.91 and 1,288.74

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Solution

The fourth proportional to 3,479.85, 5,220.91 and 1,288.74 is: 1,933.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.85 : 5,220.91 = 1,288.74 : x
  2. Step 2: Convert to fraction form
    3,479.85/5,220.91 = 1,288.74/x
  3. Step 3: Cross multiply
    3,479.85x = 5,220.91 × 1,288.74
  4. Step 4: Simplify right side
    3,479.85x = 6,728,395.55
  5. Step 5: Solve for x
    x = 6,728,395.55/3,479.85
  6. Step 6: Final answer
    x = 1,933.53

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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.