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Finding the Fourth Proportional to 394.89, 591.32 and 272.99

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Solution

The fourth proportional to 394.89, 591.32 and 272.99 is: 408.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.89 : 591.32 = 272.99 : x
  2. Step 2: Convert to fraction form
    394.89/591.32 = 272.99/x
  3. Step 3: Cross multiply
    394.89x = 591.32 × 272.99
  4. Step 4: Simplify right side
    394.89x = 161,420.13
  5. Step 5: Solve for x
    x = 161,420.13/394.89
  6. Step 6: Final answer
    x = 408.77

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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.