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Finding the Fourth Proportional to 490.31, 735.47 and 148.31

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Solution

The fourth proportional to 490.31, 735.47 and 148.31 is: 222.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.31 : 735.47 = 148.31 : x
  2. Step 2: Convert to fraction form
    490.31/735.47 = 148.31/x
  3. Step 3: Cross multiply
    490.31x = 735.47 × 148.31
  4. Step 4: Simplify right side
    490.31x = 109,079.21
  5. Step 5: Solve for x
    x = 109,079.21/490.31
  6. Step 6: Final answer
    x = 222.47

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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.