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Finding the Fourth Proportional to 407, 610.59 and 163.54

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Solution

The fourth proportional to 407, 610.59 and 163.54 is: 245.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    407 : 610.59 = 163.54 : x
  2. Step 2: Convert to fraction form
    407/610.59 = 163.54/x
  3. Step 3: Cross multiply
    407x = 610.59 × 163.54
  4. Step 4: Simplify right side
    407x = 99,855.89
  5. Step 5: Solve for x
    x = 99,855.89/407
  6. Step 6: Final answer
    x = 245.35

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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.