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Finding the Fourth Proportional to 456.31, 629.61 and 269.77

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Solution

The fourth proportional to 456.31, 629.61 and 269.77 is: 372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.31 : 629.61 = 269.77 : x
  2. Step 2: Convert to fraction form
    456.31/629.61 = 269.77/x
  3. Step 3: Cross multiply
    456.31x = 629.61 × 269.77
  4. Step 4: Simplify right side
    456.31x = 169,849.89
  5. Step 5: Solve for x
    x = 169,849.89/456.31
  6. Step 6: Final answer
    x = 372.22

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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.