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Finding the Fourth Proportional to 303.18, 418.36 and 172.16

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Solution

The fourth proportional to 303.18, 418.36 and 172.16 is: 237.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.18 : 418.36 = 172.16 : x
  2. Step 2: Convert to fraction form
    303.18/418.36 = 172.16/x
  3. Step 3: Cross multiply
    303.18x = 418.36 × 172.16
  4. Step 4: Simplify right side
    303.18x = 72,024.43
  5. Step 5: Solve for x
    x = 72,024.43/303.18
  6. Step 6: Final answer
    x = 237.57

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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.