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Finding the Fourth Proportional to 243.43, 335.75 and 172.50

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Solution

The fourth proportional to 243.43, 335.75 and 172.50 is: 237.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.43 : 335.75 = 172.50 : x
  2. Step 2: Convert to fraction form
    243.43/335.75 = 172.50/x
  3. Step 3: Cross multiply
    243.43x = 335.75 × 172.50
  4. Step 4: Simplify right side
    243.43x = 57,916.01
  5. Step 5: Solve for x
    x = 57,916.01/243.43
  6. Step 6: Final answer
    x = 237.92

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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.