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Finding the Fourth Proportional to 242.76, 334.68 and 172.82

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Solution

The fourth proportional to 242.76, 334.68 and 172.82 is: 238.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.76 : 334.68 = 172.82 : x
  2. Step 2: Convert to fraction form
    242.76/334.68 = 172.82/x
  3. Step 3: Cross multiply
    242.76x = 334.68 × 172.82
  4. Step 4: Simplify right side
    242.76x = 57,837.72
  5. Step 5: Solve for x
    x = 57,837.72/242.76
  6. Step 6: Final answer
    x = 238.25

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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.