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Finding the Fourth Proportional to 165.48, 246.68 and 147.12

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Solution

The fourth proportional to 165.48, 246.68 and 147.12 is: 219.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.48 : 246.68 = 147.12 : x
  2. Step 2: Convert to fraction form
    165.48/246.68 = 147.12/x
  3. Step 3: Cross multiply
    165.48x = 246.68 × 147.12
  4. Step 4: Simplify right side
    165.48x = 36,291.56
  5. Step 5: Solve for x
    x = 36,291.56/165.48
  6. Step 6: Final answer
    x = 219.31

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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.