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Finding the Fourth Proportional to 490.88, 736.15 and 259.64

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Solution

The fourth proportional to 490.88, 736.15 and 259.64 is: 389.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.88 : 736.15 = 259.64 : x
  2. Step 2: Convert to fraction form
    490.88/736.15 = 259.64/x
  3. Step 3: Cross multiply
    490.88x = 736.15 × 259.64
  4. Step 4: Simplify right side
    490.88x = 191,133.99
  5. Step 5: Solve for x
    x = 191,133.99/490.88
  6. Step 6: Final answer
    x = 389.37

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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.