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Finding the Fourth Proportional to 661.28, 992.83 and 336.87

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Solution

The fourth proportional to 661.28, 992.83 and 336.87 is: 505.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.28 : 992.83 = 336.87 : x
  2. Step 2: Convert to fraction form
    661.28/992.83 = 336.87/x
  3. Step 3: Cross multiply
    661.28x = 992.83 × 336.87
  4. Step 4: Simplify right side
    661.28x = 334,454.64
  5. Step 5: Solve for x
    x = 334,454.64/661.28
  6. Step 6: Final answer
    x = 505.77

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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.