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Finding the Fourth Proportional to 407.63, 611.45 and 160.85

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Solution

The fourth proportional to 407.63, 611.45 and 160.85 is: 241.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.63 : 611.45 = 160.85 : x
  2. Step 2: Convert to fraction form
    407.63/611.45 = 160.85/x
  3. Step 3: Cross multiply
    407.63x = 611.45 × 160.85
  4. Step 4: Simplify right side
    407.63x = 98,351.73
  5. Step 5: Solve for x
    x = 98,351.73/407.63
  6. Step 6: Final answer
    x = 241.28

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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.