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Finding the Fourth Proportional to 549.89, 758.80 and 301.21

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Solution

The fourth proportional to 549.89, 758.80 and 301.21 is: 415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.89 : 758.80 = 301.21 : x
  2. Step 2: Convert to fraction form
    549.89/758.80 = 301.21/x
  3. Step 3: Cross multiply
    549.89x = 758.80 × 301.21
  4. Step 4: Simplify right side
    549.89x = 228,558.15
  5. Step 5: Solve for x
    x = 228,558.15/549.89
  6. Step 6: Final answer
    x = 415.65

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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.