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Finding the Fourth Proportional to 665.82, 999.37 and 623.90

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Solution

The fourth proportional to 665.82, 999.37 and 623.90 is: 936.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.82 : 999.37 = 623.90 : x
  2. Step 2: Convert to fraction form
    665.82/999.37 = 623.90/x
  3. Step 3: Cross multiply
    665.82x = 999.37 × 623.90
  4. Step 4: Simplify right side
    665.82x = 623,506.94
  5. Step 5: Solve for x
    x = 623,506.94/665.82
  6. Step 6: Final answer
    x = 936.45

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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.