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Finding the Fourth Proportional to 165.18, 246.74 and 148.90

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Solution

The fourth proportional to 165.18, 246.74 and 148.90 is: 222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.18 : 246.74 = 148.90 : x
  2. Step 2: Convert to fraction form
    165.18/246.74 = 148.90/x
  3. Step 3: Cross multiply
    165.18x = 246.74 × 148.90
  4. Step 4: Simplify right side
    165.18x = 36,739.59
  5. Step 5: Solve for x
    x = 36,739.59/165.18
  6. Step 6: Final answer
    x = 222.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.