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Finding the Fourth Proportional to 490.72, 735.92 and 202.40

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Solution

The fourth proportional to 490.72, 735.92 and 202.40 is: 303.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.72 : 735.92 = 202.40 : x
  2. Step 2: Convert to fraction form
    490.72/735.92 = 202.40/x
  3. Step 3: Cross multiply
    490.72x = 735.92 × 202.40
  4. Step 4: Simplify right side
    490.72x = 148,950.21
  5. Step 5: Solve for x
    x = 148,950.21/490.72
  6. Step 6: Final answer
    x = 303.53

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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.