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Finding the Fourth Proportional to 163.81, 245.40 and 146.62

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Solution

The fourth proportional to 163.81, 245.40 and 146.62 is: 219.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.81 : 245.40 = 146.62 : x
  2. Step 2: Convert to fraction form
    163.81/245.40 = 146.62/x
  3. Step 3: Cross multiply
    163.81x = 245.40 × 146.62
  4. Step 4: Simplify right side
    163.81x = 35,980.55
  5. Step 5: Solve for x
    x = 35,980.55/163.81
  6. Step 6: Final answer
    x = 219.65

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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.