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Finding the Fourth Proportional to 241.61, 362.40 and 79.40

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Solution

The fourth proportional to 241.61, 362.40 and 79.40 is: 119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.61 : 362.40 = 79.40 : x
  2. Step 2: Convert to fraction form
    241.61/362.40 = 79.40/x
  3. Step 3: Cross multiply
    241.61x = 362.40 × 79.40
  4. Step 4: Simplify right side
    241.61x = 28,774.56
  5. Step 5: Solve for x
    x = 28,774.56/241.61
  6. Step 6: Final answer
    x = 119.10

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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.