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Finding the Fourth Proportional to 490.28, 735.42 and 417.64

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Solution

The fourth proportional to 490.28, 735.42 and 417.64 is: 626.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.28 : 735.42 = 417.64 : x
  2. Step 2: Convert to fraction form
    490.28/735.42 = 417.64/x
  3. Step 3: Cross multiply
    490.28x = 735.42 × 417.64
  4. Step 4: Simplify right side
    490.28x = 307,140.81
  5. Step 5: Solve for x
    x = 307,140.81/490.28
  6. Step 6: Final answer
    x = 626.46

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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.