Home / 3,480.74-5,220.20-1,288.28

Finding the Fourth Proportional to 3,480.74, 5,220.20 and 1,288.28

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Solution

The fourth proportional to 3,480.74, 5,220.20 and 1,288.28 is: 1,932.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.74 : 5,220.20 = 1,288.28 : x
  2. Step 2: Convert to fraction form
    3,480.74/5,220.20 = 1,288.28/x
  3. Step 3: Cross multiply
    3,480.74x = 5,220.20 × 1,288.28
  4. Step 4: Simplify right side
    3,480.74x = 6,725,056.38
  5. Step 5: Solve for x
    x = 6,725,056.38/3,480.74
  6. Step 6: Final answer
    x = 1,932.08

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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.