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Finding the Fourth Proportional to 275.05, 412.57 and 69.62

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Solution

The fourth proportional to 275.05, 412.57 and 69.62 is: 104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.05 : 412.57 = 69.62 : x
  2. Step 2: Convert to fraction form
    275.05/412.57 = 69.62/x
  3. Step 3: Cross multiply
    275.05x = 412.57 × 69.62
  4. Step 4: Simplify right side
    275.05x = 28,721.24
  5. Step 5: Solve for x
    x = 28,721.24/275.05
  6. Step 6: Final answer
    x = 104.42

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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.