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Finding the Fourth Proportional to 660.26, 990.39 and 335.63

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Solution

The fourth proportional to 660.26, 990.39 and 335.63 is: 503.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.26 : 990.39 = 335.63 : x
  2. Step 2: Convert to fraction form
    660.26/990.39 = 335.63/x
  3. Step 3: Cross multiply
    660.26x = 990.39 × 335.63
  4. Step 4: Simplify right side
    660.26x = 332,404.60
  5. Step 5: Solve for x
    x = 332,404.60/660.26
  6. Step 6: Final answer
    x = 503.45

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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.