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Finding the Fourth Proportional to 303.35, 418.63 and 172.36

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Solution

The fourth proportional to 303.35, 418.63 and 172.36 is: 237.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.35 : 418.63 = 172.36 : x
  2. Step 2: Convert to fraction form
    303.35/418.63 = 172.36/x
  3. Step 3: Cross multiply
    303.35x = 418.63 × 172.36
  4. Step 4: Simplify right side
    303.35x = 72,154.21
  5. Step 5: Solve for x
    x = 72,154.21/303.35
  6. Step 6: Final answer
    x = 237.86

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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.