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Finding the Fourth Proportional to 406.67, 561.19 and 229.64

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Solution

The fourth proportional to 406.67, 561.19 and 229.64 is: 316.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.67 : 561.19 = 229.64 : x
  2. Step 2: Convert to fraction form
    406.67/561.19 = 229.64/x
  3. Step 3: Cross multiply
    406.67x = 561.19 × 229.64
  4. Step 4: Simplify right side
    406.67x = 128,868.29
  5. Step 5: Solve for x
    x = 128,868.29/406.67
  6. Step 6: Final answer
    x = 316.88

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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.