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Finding the Fourth Proportional to 490.70, 735.28 and 317.26

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Solution

The fourth proportional to 490.70, 735.28 and 317.26 is: 475.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.70 : 735.28 = 317.26 : x
  2. Step 2: Convert to fraction form
    490.70/735.28 = 317.26/x
  3. Step 3: Cross multiply
    490.70x = 735.28 × 317.26
  4. Step 4: Simplify right side
    490.70x = 233,274.93
  5. Step 5: Solve for x
    x = 233,274.93/490.70
  6. Step 6: Final answer
    x = 475.39

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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.