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Finding the Fourth Proportional to 394.98, 592.59 and 285.08

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Solution

The fourth proportional to 394.98, 592.59 and 285.08 is: 427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.98 : 592.59 = 285.08 : x
  2. Step 2: Convert to fraction form
    394.98/592.59 = 285.08/x
  3. Step 3: Cross multiply
    394.98x = 592.59 × 285.08
  4. Step 4: Simplify right side
    394.98x = 168,935.56
  5. Step 5: Solve for x
    x = 168,935.56/394.98
  6. Step 6: Final answer
    x = 427.71

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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.