Home / 1,211.28-1,818.29-481.37

Finding the Fourth Proportional to 1,211.28, 1,818.29 and 481.37

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Solution

The fourth proportional to 1,211.28, 1,818.29 and 481.37 is: 722.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.28 : 1,818.29 = 481.37 : x
  2. Step 2: Convert to fraction form
    1,211.28/1,818.29 = 481.37/x
  3. Step 3: Cross multiply
    1,211.28x = 1,818.29 × 481.37
  4. Step 4: Simplify right side
    1,211.28x = 875,264.10
  5. Step 5: Solve for x
    x = 875,264.10/1,211.28
  6. Step 6: Final answer
    x = 722.59

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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.