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Finding the Fourth Proportional to 406.08, 606.96 and 345.60

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Solution

The fourth proportional to 406.08, 606.96 and 345.60 is: 516.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.08 : 606.96 = 345.60 : x
  2. Step 2: Convert to fraction form
    406.08/606.96 = 345.60/x
  3. Step 3: Cross multiply
    406.08x = 606.96 × 345.60
  4. Step 4: Simplify right side
    406.08x = 209,765.38
  5. Step 5: Solve for x
    x = 209,765.38/406.08
  6. Step 6: Final answer
    x = 516.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.