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Finding the Fourth Proportional to 407.09, 610.58 and 163.61

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Solution

The fourth proportional to 407.09, 610.58 and 163.61 is: 245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.09 : 610.58 = 163.61 : x
  2. Step 2: Convert to fraction form
    407.09/610.58 = 163.61/x
  3. Step 3: Cross multiply
    407.09x = 610.58 × 163.61
  4. Step 4: Simplify right side
    407.09x = 99,897.70
  5. Step 5: Solve for x
    x = 99,897.70/407.09
  6. Step 6: Final answer
    x = 245.40

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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.