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Finding the Fourth Proportional to 575.05, 861.89 and 300.66

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Solution

The fourth proportional to 575.05, 861.89 and 300.66 is: 450.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.05 : 861.89 = 300.66 : x
  2. Step 2: Convert to fraction form
    575.05/861.89 = 300.66/x
  3. Step 3: Cross multiply
    575.05x = 861.89 × 300.66
  4. Step 4: Simplify right side
    575.05x = 259,131.54
  5. Step 5: Solve for x
    x = 259,131.54/575.05
  6. Step 6: Final answer
    x = 450.62

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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.