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Finding the Fourth Proportional to 165.46, 248.29 and 74.20

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Solution

The fourth proportional to 165.46, 248.29 and 74.20 is: 111.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.46 : 248.29 = 74.20 : x
  2. Step 2: Convert to fraction form
    165.46/248.29 = 74.20/x
  3. Step 3: Cross multiply
    165.46x = 248.29 × 74.20
  4. Step 4: Simplify right side
    165.46x = 18,423.12
  5. Step 5: Solve for x
    x = 18,423.12/165.46
  6. Step 6: Final answer
    x = 111.34

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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.