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Finding the Fourth Proportional to 456.85, 685.31 and 182.79

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Solution

The fourth proportional to 456.85, 685.31 and 182.79 is: 274.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.85 : 685.31 = 182.79 : x
  2. Step 2: Convert to fraction form
    456.85/685.31 = 182.79/x
  3. Step 3: Cross multiply
    456.85x = 685.31 × 182.79
  4. Step 4: Simplify right side
    456.85x = 125,267.93
  5. Step 5: Solve for x
    x = 125,267.93/456.85
  6. Step 6: Final answer
    x = 274.20

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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.