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Finding the Fourth Proportional to 242.28, 334.28 and 153.81

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Solution

The fourth proportional to 242.28, 334.28 and 153.81 is: 212.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.28 : 334.28 = 153.81 : x
  2. Step 2: Convert to fraction form
    242.28/334.28 = 153.81/x
  3. Step 3: Cross multiply
    242.28x = 334.28 × 153.81
  4. Step 4: Simplify right side
    242.28x = 51,415.99
  5. Step 5: Solve for x
    x = 51,415.99/242.28
  6. Step 6: Final answer
    x = 212.22

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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.