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Finding the Fourth Proportional to 365.20, 548 and 172.82

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Solution

The fourth proportional to 365.20, 548 and 172.82 is: 259.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.20 : 548 = 172.82 : x
  2. Step 2: Convert to fraction form
    365.20/548 = 172.82/x
  3. Step 3: Cross multiply
    365.20x = 548 × 172.82
  4. Step 4: Simplify right side
    365.20x = 94,705.36
  5. Step 5: Solve for x
    x = 94,705.36/365.20
  6. Step 6: Final answer
    x = 259.32

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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.