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Finding the Fourth Proportional to 241.78, 362.64 and 79.47

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Solution

The fourth proportional to 241.78, 362.64 and 79.47 is: 119.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.78 : 362.64 = 79.47 : x
  2. Step 2: Convert to fraction form
    241.78/362.64 = 79.47/x
  3. Step 3: Cross multiply
    241.78x = 362.64 × 79.47
  4. Step 4: Simplify right side
    241.78x = 28,816.79
  5. Step 5: Solve for x
    x = 28,816.79/241.78
  6. Step 6: Final answer
    x = 119.19

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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.