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Finding the Fourth Proportional to 574.77, 861.40 and 300.79

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Solution

The fourth proportional to 574.77, 861.40 and 300.79 is: 450.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.77 : 861.40 = 300.79 : x
  2. Step 2: Convert to fraction form
    574.77/861.40 = 300.79/x
  3. Step 3: Cross multiply
    574.77x = 861.40 × 300.79
  4. Step 4: Simplify right side
    574.77x = 259,100.51
  5. Step 5: Solve for x
    x = 259,100.51/574.77
  6. Step 6: Final answer
    x = 450.79

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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.