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Finding the Fourth Proportional to 165.21, 247.53 and 147.34

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Solution

The fourth proportional to 165.21, 247.53 and 147.34 is: 220.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.21 : 247.53 = 147.34 : x
  2. Step 2: Convert to fraction form
    165.21/247.53 = 147.34/x
  3. Step 3: Cross multiply
    165.21x = 247.53 × 147.34
  4. Step 4: Simplify right side
    165.21x = 36,471.07
  5. Step 5: Solve for x
    x = 36,471.07/165.21
  6. Step 6: Final answer
    x = 220.76

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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.