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Finding the Fourth Proportional to 275.32, 412.67 and 172.65

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Solution

The fourth proportional to 275.32, 412.67 and 172.65 is: 258.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.32 : 412.67 = 172.65 : x
  2. Step 2: Convert to fraction form
    275.32/412.67 = 172.65/x
  3. Step 3: Cross multiply
    275.32x = 412.67 × 172.65
  4. Step 4: Simplify right side
    275.32x = 71,247.91
  5. Step 5: Solve for x
    x = 71,247.91/275.32
  6. Step 6: Final answer
    x = 258.78

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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.