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Finding the Fourth Proportional to 660.66, 991.44 and 336.30

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Solution

The fourth proportional to 660.66, 991.44 and 336.30 is: 504.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.66 : 991.44 = 336.30 : x
  2. Step 2: Convert to fraction form
    660.66/991.44 = 336.30/x
  3. Step 3: Cross multiply
    660.66x = 991.44 × 336.30
  4. Step 4: Simplify right side
    660.66x = 333,421.27
  5. Step 5: Solve for x
    x = 333,421.27/660.66
  6. Step 6: Final answer
    x = 504.68

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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.