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Finding the Fourth Proportional to 242.81, 364.25 and 80.51

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Solution

The fourth proportional to 242.81, 364.25 and 80.51 is: 120.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.81 : 364.25 = 80.51 : x
  2. Step 2: Convert to fraction form
    242.81/364.25 = 80.51/x
  3. Step 3: Cross multiply
    242.81x = 364.25 × 80.51
  4. Step 4: Simplify right side
    242.81x = 29,323.54
  5. Step 5: Solve for x
    x = 29,323.54/242.81
  6. Step 6: Final answer
    x = 120.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.