Home / 3,586.56-5,380.80-1,278.72

Finding the Fourth Proportional to 3,586.56, 5,380.80 and 1,278.72

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Solution

The fourth proportional to 3,586.56, 5,380.80 and 1,278.72 is: 1,918.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.56 : 5,380.80 = 1,278.72 : x
  2. Step 2: Convert to fraction form
    3,586.56/5,380.80 = 1,278.72/x
  3. Step 3: Cross multiply
    3,586.56x = 5,380.80 × 1,278.72
  4. Step 4: Simplify right side
    3,586.56x = 6,880,536.58
  5. Step 5: Solve for x
    x = 6,880,536.58/3,586.56
  6. Step 6: Final answer
    x = 1,918.42

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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.