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Finding the Fourth Proportional to 456.48, 684.55 and 163.90

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Solution

The fourth proportional to 456.48, 684.55 and 163.90 is: 245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.48 : 684.55 = 163.90 : x
  2. Step 2: Convert to fraction form
    456.48/684.55 = 163.90/x
  3. Step 3: Cross multiply
    456.48x = 684.55 × 163.90
  4. Step 4: Simplify right side
    456.48x = 112,197.75
  5. Step 5: Solve for x
    x = 112,197.75/456.48
  6. Step 6: Final answer
    x = 245.79

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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.