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Finding the Fourth Proportional to 549.98, 823.30 and 305.76

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Solution

The fourth proportional to 549.98, 823.30 and 305.76 is: 457.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.98 : 823.30 = 305.76 : x
  2. Step 2: Convert to fraction form
    549.98/823.30 = 305.76/x
  3. Step 3: Cross multiply
    549.98x = 823.30 × 305.76
  4. Step 4: Simplify right side
    549.98x = 251,732.21
  5. Step 5: Solve for x
    x = 251,732.21/549.98
  6. Step 6: Final answer
    x = 457.71

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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.