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Finding the Fourth Proportional to 242, 333.78 and 153.53

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Solution

The fourth proportional to 242, 333.78 and 153.53 is: 211.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    242 : 333.78 = 153.53 : x
  2. Step 2: Convert to fraction form
    242/333.78 = 153.53/x
  3. Step 3: Cross multiply
    242x = 333.78 × 153.53
  4. Step 4: Simplify right side
    242x = 51,245.24
  5. Step 5: Solve for x
    x = 51,245.24/242
  6. Step 6: Final answer
    x = 211.76

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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.