Home / 3,680.78-5,521.50-1,215.54

Finding the Fourth Proportional to 3,680.78, 5,521.50 and 1,215.54

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Solution

The fourth proportional to 3,680.78, 5,521.50 and 1,215.54 is: 1,823.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,680.78 : 5,521.50 = 1,215.54 : x
  2. Step 2: Convert to fraction form
    3,680.78/5,521.50 = 1,215.54/x
  3. Step 3: Cross multiply
    3,680.78x = 5,521.50 × 1,215.54
  4. Step 4: Simplify right side
    3,680.78x = 6,711,604.11
  5. Step 5: Solve for x
    x = 6,711,604.11/3,680.78
  6. Step 6: Final answer
    x = 1,823.42

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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.