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Finding the Fourth Proportional to 303.88, 419.38 and 172.92

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Solution

The fourth proportional to 303.88, 419.38 and 172.92 is: 238.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.88 : 419.38 = 172.92 : x
  2. Step 2: Convert to fraction form
    303.88/419.38 = 172.92/x
  3. Step 3: Cross multiply
    303.88x = 419.38 × 172.92
  4. Step 4: Simplify right side
    303.88x = 72,519.19
  5. Step 5: Solve for x
    x = 72,519.19/303.88
  6. Step 6: Final answer
    x = 238.64

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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.