Home / 3,521.28-5,279.85-1,328.85

Finding the Fourth Proportional to 3,521.28, 5,279.85 and 1,328.85

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Solution

The fourth proportional to 3,521.28, 5,279.85 and 1,328.85 is: 1,992.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,521.28 : 5,279.85 = 1,328.85 : x
  2. Step 2: Convert to fraction form
    3,521.28/5,279.85 = 1,328.85/x
  3. Step 3: Cross multiply
    3,521.28x = 5,279.85 × 1,328.85
  4. Step 4: Simplify right side
    3,521.28x = 7,016,128.67
  5. Step 5: Solve for x
    x = 7,016,128.67/3,521.28
  6. Step 6: Final answer
    x = 1,992.49

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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.