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Finding the Fourth Proportional to 409.03, 613.79 and 165.58

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Solution

The fourth proportional to 409.03, 613.79 and 165.58 is: 248.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.03 : 613.79 = 165.58 : x
  2. Step 2: Convert to fraction form
    409.03/613.79 = 165.58/x
  3. Step 3: Cross multiply
    409.03x = 613.79 × 165.58
  4. Step 4: Simplify right side
    409.03x = 101,631.35
  5. Step 5: Solve for x
    x = 101,631.35/409.03
  6. Step 6: Final answer
    x = 248.47

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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.