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Finding the Fourth Proportional to 661.38, 991.32 and 336.06

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Solution

The fourth proportional to 661.38, 991.32 and 336.06 is: 503.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.38 : 991.32 = 336.06 : x
  2. Step 2: Convert to fraction form
    661.38/991.32 = 336.06/x
  3. Step 3: Cross multiply
    661.38x = 991.32 × 336.06
  4. Step 4: Simplify right side
    661.38x = 333,143.00
  5. Step 5: Solve for x
    x = 333,143.00/661.38
  6. Step 6: Final answer
    x = 503.71

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.