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Finding the Fourth Proportional to 456.45, 629.83 and 257.29

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Solution

The fourth proportional to 456.45, 629.83 and 257.29 is: 355.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.45 : 629.83 = 257.29 : x
  2. Step 2: Convert to fraction form
    456.45/629.83 = 257.29/x
  3. Step 3: Cross multiply
    456.45x = 629.83 × 257.29
  4. Step 4: Simplify right side
    456.45x = 162,048.96
  5. Step 5: Solve for x
    x = 162,048.96/456.45
  6. Step 6: Final answer
    x = 355.02

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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.