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Finding the Fourth Proportional to 505.38, 694.98 and 404.54

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Solution

The fourth proportional to 505.38, 694.98 and 404.54 is: 556.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.38 : 694.98 = 404.54 : x
  2. Step 2: Convert to fraction form
    505.38/694.98 = 404.54/x
  3. Step 3: Cross multiply
    505.38x = 694.98 × 404.54
  4. Step 4: Simplify right side
    505.38x = 281,145.85
  5. Step 5: Solve for x
    x = 281,145.85/505.38
  6. Step 6: Final answer
    x = 556.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.