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Finding the Fourth Proportional to 456.67, 684.36 and 261.27

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Solution

The fourth proportional to 456.67, 684.36 and 261.27 is: 391.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.67 : 684.36 = 261.27 : x
  2. Step 2: Convert to fraction form
    456.67/684.36 = 261.27/x
  3. Step 3: Cross multiply
    456.67x = 684.36 × 261.27
  4. Step 4: Simplify right side
    456.67x = 178,802.74
  5. Step 5: Solve for x
    x = 178,802.74/456.67
  6. Step 6: Final answer
    x = 391.54

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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.