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Finding the Fourth Proportional to 490.80, 736.08 and 178.40

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Solution

The fourth proportional to 490.80, 736.08 and 178.40 is: 267.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.80 : 736.08 = 178.40 : x
  2. Step 2: Convert to fraction form
    490.80/736.08 = 178.40/x
  3. Step 3: Cross multiply
    490.80x = 736.08 × 178.40
  4. Step 4: Simplify right side
    490.80x = 131,316.67
  5. Step 5: Solve for x
    x = 131,316.67/490.80
  6. Step 6: Final answer
    x = 267.56

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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.