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Finding the Fourth Proportional to 665.27, 996.99 and 339.95

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Solution

The fourth proportional to 665.27, 996.99 and 339.95 is: 509.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.27 : 996.99 = 339.95 : x
  2. Step 2: Convert to fraction form
    665.27/996.99 = 339.95/x
  3. Step 3: Cross multiply
    665.27x = 996.99 × 339.95
  4. Step 4: Simplify right side
    665.27x = 338,921.77
  5. Step 5: Solve for x
    x = 338,921.77/665.27
  6. Step 6: Final answer
    x = 509.45

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Double scale
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Similar ratio
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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.