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Finding the Fourth Proportional to 303.06, 418.20 and 172.08

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Solution

The fourth proportional to 303.06, 418.20 and 172.08 is: 237.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.06 : 418.20 = 172.08 : x
  2. Step 2: Convert to fraction form
    303.06/418.20 = 172.08/x
  3. Step 3: Cross multiply
    303.06x = 418.20 × 172.08
  4. Step 4: Simplify right side
    303.06x = 71,963.86
  5. Step 5: Solve for x
    x = 71,963.86/303.06
  6. Step 6: Final answer
    x = 237.46

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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.