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Finding the Fourth Proportional to 549.34, 758.28 and 393.82

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Solution

The fourth proportional to 549.34, 758.28 and 393.82 is: 543.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.34 : 758.28 = 393.82 : x
  2. Step 2: Convert to fraction form
    549.34/758.28 = 393.82/x
  3. Step 3: Cross multiply
    549.34x = 758.28 × 393.82
  4. Step 4: Simplify right side
    549.34x = 298,625.83
  5. Step 5: Solve for x
    x = 298,625.83/549.34
  6. Step 6: Final answer
    x = 543.61

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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.