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Finding the Fourth Proportional to 575.35, 861.65 and 331.36

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Solution

The fourth proportional to 575.35, 861.65 and 331.36 is: 496.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.35 : 861.65 = 331.36 : x
  2. Step 2: Convert to fraction form
    575.35/861.65 = 331.36/x
  3. Step 3: Cross multiply
    575.35x = 861.65 × 331.36
  4. Step 4: Simplify right side
    575.35x = 285,514.69
  5. Step 5: Solve for x
    x = 285,514.69/575.35
  6. Step 6: Final answer
    x = 496.25

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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.