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Finding the Fourth Proportional to 506.34, 698.82 and 285.31

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Solution

The fourth proportional to 506.34, 698.82 and 285.31 is: 393.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.34 : 698.82 = 285.31 : x
  2. Step 2: Convert to fraction form
    506.34/698.82 = 285.31/x
  3. Step 3: Cross multiply
    506.34x = 698.82 × 285.31
  4. Step 4: Simplify right side
    506.34x = 199,380.33
  5. Step 5: Solve for x
    x = 199,380.33/506.34
  6. Step 6: Final answer
    x = 393.77

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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.