Home / 3,480.18-5,218.65-1,288.86

Finding the Fourth Proportional to 3,480.18, 5,218.65 and 1,288.86

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Solution

The fourth proportional to 3,480.18, 5,218.65 and 1,288.86 is: 1,932.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.18 : 5,218.65 = 1,288.86 : x
  2. Step 2: Convert to fraction form
    3,480.18/5,218.65 = 1,288.86/x
  3. Step 3: Cross multiply
    3,480.18x = 5,218.65 × 1,288.86
  4. Step 4: Simplify right side
    3,480.18x = 6,726,109.24
  5. Step 5: Solve for x
    x = 6,726,109.24/3,480.18
  6. Step 6: Final answer
    x = 1,932.69

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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.