Home / 3,278.60-4,917.90-1,087.28

Finding the Fourth Proportional to 3,278.60, 4,917.90 and 1,087.28

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Solution

The fourth proportional to 3,278.60, 4,917.90 and 1,087.28 is: 1,630.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.60 : 4,917.90 = 1,087.28 : x
  2. Step 2: Convert to fraction form
    3,278.60/4,917.90 = 1,087.28/x
  3. Step 3: Cross multiply
    3,278.60x = 4,917.90 × 1,087.28
  4. Step 4: Simplify right side
    3,278.60x = 5,347,134.31
  5. Step 5: Solve for x
    x = 5,347,134.31/3,278.60
  6. Step 6: Final answer
    x = 1,630.92

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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.