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Finding the Fourth Proportional to 490.63, 735.95 and 125.45

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Solution

The fourth proportional to 490.63, 735.95 and 125.45 is: 188.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.63 : 735.95 = 125.45 : x
  2. Step 2: Convert to fraction form
    490.63/735.95 = 125.45/x
  3. Step 3: Cross multiply
    490.63x = 735.95 × 125.45
  4. Step 4: Simplify right side
    490.63x = 92,320.62
  5. Step 5: Solve for x
    x = 92,320.62/490.63
  6. Step 6: Final answer
    x = 188.17

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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.