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Finding the Fourth Proportional to 789.78, 1,184.79 and 241.91

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Solution

The fourth proportional to 789.78, 1,184.79 and 241.91 is: 362.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.78 : 1,184.79 = 241.91 : x
  2. Step 2: Convert to fraction form
    789.78/1,184.79 = 241.91/x
  3. Step 3: Cross multiply
    789.78x = 1,184.79 × 241.91
  4. Step 4: Simplify right side
    789.78x = 286,612.55
  5. Step 5: Solve for x
    x = 286,612.55/789.78
  6. Step 6: Final answer
    x = 362.90

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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.