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Finding the Fourth Proportional to 303.92, 419.38 and 172.93

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Solution

The fourth proportional to 303.92, 419.38 and 172.93 is: 238.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.92 : 419.38 = 172.93 : x
  2. Step 2: Convert to fraction form
    303.92/419.38 = 172.93/x
  3. Step 3: Cross multiply
    303.92x = 419.38 × 172.93
  4. Step 4: Simplify right side
    303.92x = 72,523.38
  5. Step 5: Solve for x
    x = 72,523.38/303.92
  6. Step 6: Final answer
    x = 238.63

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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.