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Finding the Fourth Proportional to 549.24, 821.70 and 395.46

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Solution

The fourth proportional to 549.24, 821.70 and 395.46 is: 591.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.24 : 821.70 = 395.46 : x
  2. Step 2: Convert to fraction form
    549.24/821.70 = 395.46/x
  3. Step 3: Cross multiply
    549.24x = 821.70 × 395.46
  4. Step 4: Simplify right side
    549.24x = 324,949.48
  5. Step 5: Solve for x
    x = 324,949.48/549.24
  6. Step 6: Final answer
    x = 591.63

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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.