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Finding the Fourth Proportional to 456.51, 685.11 and 182.78

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Solution

The fourth proportional to 456.51, 685.11 and 182.78 is: 274.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.51 : 685.11 = 182.78 : x
  2. Step 2: Convert to fraction form
    456.51/685.11 = 182.78/x
  3. Step 3: Cross multiply
    456.51x = 685.11 × 182.78
  4. Step 4: Simplify right side
    456.51x = 125,224.23
  5. Step 5: Solve for x
    x = 125,224.23/456.51
  6. Step 6: Final answer
    x = 274.31

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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.