Home / 1,228.48-1,694.82-1,222.96

Finding the Fourth Proportional to 1,228.48, 1,694.82 and 1,222.96

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Solution

The fourth proportional to 1,228.48, 1,694.82 and 1,222.96 is: 1,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.48 : 1,694.82 = 1,222.96 : x
  2. Step 2: Convert to fraction form
    1,228.48/1,694.82 = 1,222.96/x
  3. Step 3: Cross multiply
    1,228.48x = 1,694.82 × 1,222.96
  4. Step 4: Simplify right side
    1,228.48x = 2,072,697.07
  5. Step 5: Solve for x
    x = 2,072,697.07/1,228.48
  6. Step 6: Final answer
    x = 1,687.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.