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Finding the Fourth Proportional to 549.48, 823.26 and 321

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Solution

The fourth proportional to 549.48, 823.26 and 321 is: 480.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.48 : 823.26 = 321 : x
  2. Step 2: Convert to fraction form
    549.48/823.26 = 321/x
  3. Step 3: Cross multiply
    549.48x = 823.26 × 321
  4. Step 4: Simplify right side
    549.48x = 264,266.46
  5. Step 5: Solve for x
    x = 264,266.46/549.48
  6. Step 6: Final answer
    x = 480.94

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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.