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Finding the Fourth Proportional to 727.48, 1,090.16 and 449.24

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Solution

The fourth proportional to 727.48, 1,090.16 and 449.24 is: 673.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.48 : 1,090.16 = 449.24 : x
  2. Step 2: Convert to fraction form
    727.48/1,090.16 = 449.24/x
  3. Step 3: Cross multiply
    727.48x = 1,090.16 × 449.24
  4. Step 4: Simplify right side
    727.48x = 489,743.48
  5. Step 5: Solve for x
    x = 489,743.48/727.48
  6. Step 6: Final answer
    x = 673.21

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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.