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Finding the Fourth Proportional to 394.93, 591.58 and 279.91

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Solution

The fourth proportional to 394.93, 591.58 and 279.91 is: 419.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.93 : 591.58 = 279.91 : x
  2. Step 2: Convert to fraction form
    394.93/591.58 = 279.91/x
  3. Step 3: Cross multiply
    394.93x = 591.58 × 279.91
  4. Step 4: Simplify right side
    394.93x = 165,589.16
  5. Step 5: Solve for x
    x = 165,589.16/394.93
  6. Step 6: Final answer
    x = 419.29

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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.