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Finding the Fourth Proportional to 303.53, 418.92 and 172.51

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Solution

The fourth proportional to 303.53, 418.92 and 172.51 is: 238.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.53 : 418.92 = 172.51 : x
  2. Step 2: Convert to fraction form
    303.53/418.92 = 172.51/x
  3. Step 3: Cross multiply
    303.53x = 418.92 × 172.51
  4. Step 4: Simplify right side
    303.53x = 72,267.89
  5. Step 5: Solve for x
    x = 72,267.89/303.53
  6. Step 6: Final answer
    x = 238.09

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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.