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Finding the Fourth Proportional to 242.15, 334.26 and 172.26

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Solution

The fourth proportional to 242.15, 334.26 and 172.26 is: 237.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.15 : 334.26 = 172.26 : x
  2. Step 2: Convert to fraction form
    242.15/334.26 = 172.26/x
  3. Step 3: Cross multiply
    242.15x = 334.26 × 172.26
  4. Step 4: Simplify right side
    242.15x = 57,579.63
  5. Step 5: Solve for x
    x = 57,579.63/242.15
  6. Step 6: Final answer
    x = 237.79

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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.