Home / 1,228.12-1,842.23-487.88

Finding the Fourth Proportional to 1,228.12, 1,842.23 and 487.88

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Solution

The fourth proportional to 1,228.12, 1,842.23 and 487.88 is: 731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.12 : 1,842.23 = 487.88 : x
  2. Step 2: Convert to fraction form
    1,228.12/1,842.23 = 487.88/x
  3. Step 3: Cross multiply
    1,228.12x = 1,842.23 × 487.88
  4. Step 4: Simplify right side
    1,228.12x = 898,786.09
  5. Step 5: Solve for x
    x = 898,786.09/1,228.12
  6. Step 6: Final answer
    x = 731.84

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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.