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Finding the Fourth Proportional to 490.90, 735.99 and 479.38

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Solution

The fourth proportional to 490.90, 735.99 and 479.38 is: 718.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.90 : 735.99 = 479.38 : x
  2. Step 2: Convert to fraction form
    490.90/735.99 = 479.38/x
  3. Step 3: Cross multiply
    490.90x = 735.99 × 479.38
  4. Step 4: Simplify right side
    490.90x = 352,818.89
  5. Step 5: Solve for x
    x = 352,818.89/490.90
  6. Step 6: Final answer
    x = 718.72

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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.