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Finding the Fourth Proportional to 660.78, 992.08 and 336.37

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Solution

The fourth proportional to 660.78, 992.08 and 336.37 is: 505.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.78 : 992.08 = 336.37 : x
  2. Step 2: Convert to fraction form
    660.78/992.08 = 336.37/x
  3. Step 3: Cross multiply
    660.78x = 992.08 × 336.37
  4. Step 4: Simplify right side
    660.78x = 333,705.95
  5. Step 5: Solve for x
    x = 333,705.95/660.78
  6. Step 6: Final answer
    x = 505.02

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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.