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Finding the Fourth Proportional to 439.42, 659.38 and 165.57

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Solution

The fourth proportional to 439.42, 659.38 and 165.57 is: 248.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.42 : 659.38 = 165.57 : x
  2. Step 2: Convert to fraction form
    439.42/659.38 = 165.57/x
  3. Step 3: Cross multiply
    439.42x = 659.38 × 165.57
  4. Step 4: Simplify right side
    439.42x = 109,173.55
  5. Step 5: Solve for x
    x = 109,173.55/439.42
  6. Step 6: Final answer
    x = 248.45

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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.