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Finding the Fourth Proportional to 574.50, 792.56 and 449.66

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Solution

The fourth proportional to 574.50, 792.56 and 449.66 is: 620.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.50 : 792.56 = 449.66 : x
  2. Step 2: Convert to fraction form
    574.50/792.56 = 449.66/x
  3. Step 3: Cross multiply
    574.50x = 792.56 × 449.66
  4. Step 4: Simplify right side
    574.50x = 356,383.51
  5. Step 5: Solve for x
    x = 356,383.51/574.50
  6. Step 6: Final answer
    x = 620.34

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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.