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Finding the Fourth Proportional to 164.81, 246.90 and 147.62

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Solution

The fourth proportional to 164.81, 246.90 and 147.62 is: 221.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.81 : 246.90 = 147.62 : x
  2. Step 2: Convert to fraction form
    164.81/246.90 = 147.62/x
  3. Step 3: Cross multiply
    164.81x = 246.90 × 147.62
  4. Step 4: Simplify right side
    164.81x = 36,447.38
  5. Step 5: Solve for x
    x = 36,447.38/164.81
  6. Step 6: Final answer
    x = 221.15

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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.