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Finding the Fourth Proportional to 179.68, 247.87 and 172.69

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Solution

The fourth proportional to 179.68, 247.87 and 172.69 is: 238.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.68 : 247.87 = 172.69 : x
  2. Step 2: Convert to fraction form
    179.68/247.87 = 172.69/x
  3. Step 3: Cross multiply
    179.68x = 247.87 × 172.69
  4. Step 4: Simplify right side
    179.68x = 42,804.67
  5. Step 5: Solve for x
    x = 42,804.67/179.68
  6. Step 6: Final answer
    x = 238.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.