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Finding the Fourth Proportional to 456.20, 629.56 and 269.68

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Solution

The fourth proportional to 456.20, 629.56 and 269.68 is: 372.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.20 : 629.56 = 269.68 : x
  2. Step 2: Convert to fraction form
    456.20/629.56 = 269.68/x
  3. Step 3: Cross multiply
    456.20x = 629.56 × 269.68
  4. Step 4: Simplify right side
    456.20x = 169,779.74
  5. Step 5: Solve for x
    x = 169,779.74/456.20
  6. Step 6: Final answer
    x = 372.16

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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.