Home / 3,478.56-5,214.87-1,286.88

Finding the Fourth Proportional to 3,478.56, 5,214.87 and 1,286.88

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Solution

The fourth proportional to 3,478.56, 5,214.87 and 1,286.88 is: 1,929.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.56 : 5,214.87 = 1,286.88 : x
  2. Step 2: Convert to fraction form
    3,478.56/5,214.87 = 1,286.88/x
  3. Step 3: Cross multiply
    3,478.56x = 5,214.87 × 1,286.88
  4. Step 4: Simplify right side
    3,478.56x = 6,710,911.91
  5. Step 5: Solve for x
    x = 6,710,911.91/3,478.56
  6. Step 6: Final answer
    x = 1,929.22

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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.