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Finding the Fourth Proportional to 660.97, 991.86 and 336.16

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Solution

The fourth proportional to 660.97, 991.86 and 336.16 is: 504.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.97 : 991.86 = 336.16 : x
  2. Step 2: Convert to fraction form
    660.97/991.86 = 336.16/x
  3. Step 3: Cross multiply
    660.97x = 991.86 × 336.16
  4. Step 4: Simplify right side
    660.97x = 333,423.66
  5. Step 5: Solve for x
    x = 333,423.66/660.97
  6. Step 6: Final answer
    x = 504.45

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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.