Home / 1,218.80-1,827.72-449.36

Finding the Fourth Proportional to 1,218.80, 1,827.72 and 449.36

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Solution

The fourth proportional to 1,218.80, 1,827.72 and 449.36 is: 673.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.80 : 1,827.72 = 449.36 : x
  2. Step 2: Convert to fraction form
    1,218.80/1,827.72 = 449.36/x
  3. Step 3: Cross multiply
    1,218.80x = 1,827.72 × 449.36
  4. Step 4: Simplify right side
    1,218.80x = 821,304.26
  5. Step 5: Solve for x
    x = 821,304.26/1,218.80
  6. Step 6: Final answer
    x = 673.86

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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.