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Finding the Fourth Proportional to 660.62, 990.83 and 335.81

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Solution

The fourth proportional to 660.62, 990.83 and 335.81 is: 503.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.62 : 990.83 = 335.81 : x
  2. Step 2: Convert to fraction form
    660.62/990.83 = 335.81/x
  3. Step 3: Cross multiply
    660.62x = 990.83 × 335.81
  4. Step 4: Simplify right side
    660.62x = 332,733.94
  5. Step 5: Solve for x
    x = 332,733.94/660.62
  6. Step 6: Final answer
    x = 503.67

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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.