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Finding the Fourth Proportional to 660.70, 991.08 and 335.98

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Solution

The fourth proportional to 660.70, 991.08 and 335.98 is: 503.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.70 : 991.08 = 335.98 : x
  2. Step 2: Convert to fraction form
    660.70/991.08 = 335.98/x
  3. Step 3: Cross multiply
    660.70x = 991.08 × 335.98
  4. Step 4: Simplify right side
    660.70x = 332,983.06
  5. Step 5: Solve for x
    x = 332,983.06/660.70
  6. Step 6: Final answer
    x = 503.99

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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.