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Finding the Fourth Proportional to 263.05, 394.10 and 118.69

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Solution

The fourth proportional to 263.05, 394.10 and 118.69 is: 177.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.05 : 394.10 = 118.69 : x
  2. Step 2: Convert to fraction form
    263.05/394.10 = 118.69/x
  3. Step 3: Cross multiply
    263.05x = 394.10 × 118.69
  4. Step 4: Simplify right side
    263.05x = 46,775.14
  5. Step 5: Solve for x
    x = 46,775.14/263.05
  6. Step 6: Final answer
    x = 177.82

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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.