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Finding the Fourth Proportional to 242.36, 334.34 and 155

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Solution

The fourth proportional to 242.36, 334.34 and 155 is: 213.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.36 : 334.34 = 155 : x
  2. Step 2: Convert to fraction form
    242.36/334.34 = 155/x
  3. Step 3: Cross multiply
    242.36x = 334.34 × 155
  4. Step 4: Simplify right side
    242.36x = 51,822.70
  5. Step 5: Solve for x
    x = 51,822.70/242.36
  6. Step 6: Final answer
    x = 213.83

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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.